There are the numbers of ON cells in A164982 when we reach a triangle that is as full as it can be.
Table of n, a(n) for n=0..6.
Index entries for sequences related to cellular automata
Sequence in context: A052482 A061136 A308648 * A027991 A120304 A289652
Adjacent sequences: A246999 A247000 A247001 * A247003 A247004 A247005
N. J. A. Sloane, Sep 21 2014