N. J. A. Sloane's Online Encyclopedia of Integer Sequences is one of the most useful numerical resources anywhere. If you're not familiar with it, you owe it to yourself to look at it and try a few searches.
I've contributed to a number of Sloane's sequences. In some cases I wrote and optimized programs and applied a few trillion cycles; in others, I simply conveyed research I had come across when the database was behind. Primarily for my own interest I compiled this list:
Here's my collection of information which has not yet appeared in the encylopedia, or which may not appear there: