

A231349


Number of triangles added at nth stage to the structure of A231348.


4



1, 2, 4, 4, 4, 8, 10, 8, 4, 8, 12, 16, 10, 20, 22, 16, 4, 8, 12, 16, 12, 24, 28, 32, 10, 20, 28, 40, 22, 44, 46, 32, 4, 8, 12, 16, 12, 24, 28, 32, 12, 24, 32, 48, 28, 56, 60, 64, 10, 20, 28, 40, 28, 56, 64, 80, 22, 44, 60, 88, 46, 92, 94, 64
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OFFSET

1,2


COMMENTS

First differences of A231348.
Observation: the row sums of the first seven rows coincide with the first seven elements of A199923.
Is A199923 the row sums of this triangle?


LINKS

Table of n, a(n) for n=1..64.
N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS


EXAMPLE

Written as an irregular triangle in which row lengths is A011782 the sequence begins:
1;
2;
4,4;
4,8,10,8;
4,8,12,16,10,20,22,16;
4,8,12,16,12,24,28,32,10,20,28,40,22,44,46,32;
4,8,12,16,12,24,28,32,12,24,32,48,28,56,60,64,10,20,28,40, 28,56,64,80,22,44,60,88,46,92,94,64;


CROSSREFS

Right border gives A000079.
Cf. A001316, A011782, A231348.
Sequence in context: A076340 A076345 A327331 * A170893 A194445 A220525
Adjacent sequences: A231346 A231347 A231348 * A231350 A231351 A231352


KEYWORD

nonn,tabf


AUTHOR

Omar E. Pol, Dec 15 2013


STATUS

approved



