<pre>
How can I find the next number in this series?  Are "complete this
series" problems well defined?
[[ Solution 1|Solution |]]

Listed below are series that have occurred on rec.puzzles that are not in the "On-Line Encyclopedia of Integers Sequences", which is available at:

http://www.research.att.com/~njas/sequences/index.html

The notation '''CS''' indicates that the problem is country (or culture) specific.  That is, it relies on knowledge specific to some countries or cultures.

M, N, B, D, P?
[[ Solution 2|Solution |]]

H, H, L, B, B, C, N, O, F?
[[ Solution 3|Solution |]]

W, A, J, M, M, A, J? '''CS'''
[[ Solution 4|Solution |]]

G, J, T, J, J, J, A, M, W, J, J, Z, M, F, J? '''CS'''
[[ Solution 5|Solution |]]

M, A, M, D, E, L, R, H? '''CS'''
[[ Solution 6|Solution |]]

A, E, H, I, K, L? '''CS'''
[[ Solution 7|Solution |]]

A, B, C, D, E, F, G, H? '''CS'''
[[ Solution 8|Solution |]]

Z, O, T, T, F, F, S, S, E, N?
[[ Solution 9|Solution |]]

F, S, T, F, F, S?
[[ Solution 10|Solution |]]

1, 1 1, 2 1, 1 2 1 1, 1 1 1 2 2 1?
[[ Solution 11|Solution |]]

G, L, M, B, C, L, M, C, F, S? '''CS'''
[[ Solution 12|Solution |]]

A, V, R, R, C, C, L, L, L, E? '''CS'''
[[ Solution 13|Solution |]]

S, M, S, S, S, C, P, P, P? '''CS'''
[[ Solution 14|Solution |]]

M, S, C, P, P, P, S, S, S? '''CS'''
[[ Solution 15|Solution |]]

D, P, N, G, C, M, M, S? '''CS'''
[[ Solution 16|Solution |]]

R, O, Y, G, B?
[[ Solution 17|Solution |]]

A, T, G, C, L?
[[ Solution 18|Solution |]]

M, V, E, M, J, S?
[[ Solution 19|Solution |]]

A, B, D, O, P?
[[ Solution 20|Solution |]]

A, B, D, E, G, O, P?
[[ Solution 21|Solution |]]

A, E, F, H, I?
[[ Solution 22|Solution |]]

A, B, C, D, E, F, G, H, I, J, K, L, M, N, O, P, Q, R, S, T, U, V, X, Y?
[[ Solution 23|Solution |]]

T, P, O, F, O, F, N, T, S, F, T, F, E, N, S, N?
[[ Solution 24|Solution |]]

0, 01, 01011, 0101101011011, 0101101011011010110101101101011011?
[[ Solution 26|Solution |]]

22, 22, 30, 13, 13, 16, 16, 28, 28, 11? '''CS'''
[[ Solution 30|Solution |]]

What is the next letter in the sequence: W, I, T, N, L, I, T?
[[ Solution 31|Solution |]]

I, I, T, Y, W, I, M, W, Y, B, M, A, D?
[[ Solution 37|Solution |]]

E, T, I, A, N, M, S, U, R, W, D, K, G, O?
[[ Solution 43|Solution |]]

10^3, 10^9, 10^27, 10^2, 0, 4, 8, 3?
[[ Solution 44|Solution |]]

?, ?, ?, T, W, H, R, F, U, I, ?, ?
[[ Solution 45|Solution |]]

M, E, P, B, P?
[[ Solution 46|Solution |]]
</pre>
