A294981 a(n) is the number of elements added at n-th stage to the structure of the cellular automaton of A294980.
1, 3, 6, 6, 6, 18, 18, 18, 6
Offset: 1
Examples
This cellular automaton has word "ab". The row lengths are the terms of A011782 multiplied by 2, so the structure of this irregular triangle is as follows: a,b; a,b; a,b,a,b; a,b,a,b,a,b,a,b; a,b,a,b,a,b,a,b,a,b,a,b,a,b,a,b; ... Triangle begins: 1, 3; 6, 6; 6, 18, 18, 18; ...