an On-Line EIS Hall of Fame

[Antti Karttunen]

My worth of two A's:

A000027: Certainly a sequence that has amazed masses and evoked
hard-to-answer questions right
from very young age, more than any other sequence invented in the history of
the mankind.
Furthermore, the terms have very interesting expansion in base-2, or
actually in any base,
and the sequence is also the identity element of  the (infinite) symmetric
group.

For the triangles, I suggest the all-time classic A007318.


Terveisin,

Antti Karttunen