A231349 Number of triangles added at n-th stage to the structure of A231348.

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

Offset: 1

Author

Omar E. Pol, Dec 15 2013

Keywords

• nonn
• tabf

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?

Examples

			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;
		

Links

• N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS

Crossrefs

Right border gives A000079.

Cf. A001316, A011782, A231348.