A233972 a(n) = A233971(n+1)/2.

1, 1, 2, 1, 2, 3, 4, 1, 2, 3, 5, 5, 4, 7, 8, 1, 2, 3, 5, 5, 5, 9, 12, 11, 4, 7, 11, 13, 8, 15, 16, 1, 2, 3, 5, 5, 5, 9, 12, 11, 5, 9, 14, 19, 14, 23, 28, 27, 4, 7, 11, 13, 11, 21, 28, 31, 8, 15, 23, 29, 16, 31, 32, 1, 2, 3, 5, 5, 5, 9, 12, 11, 5, 9, 14

Offset: 1

Author

Omar E. Pol, Dec 18 2013

Keywords

• nonn
• tabf

Examples

			Written as an irregular triangle in which row lengths is A000079 the sequence begins:
1,
1,2,
1,2,3,4,
1,2,3,5,5,4,7,8,
1,2,3,5,5,5,9,12,11,4,7,11,13,8,15,16,
1,2,3,5,5,5,9,12,11,5,9,14,19,14,23,28,27,4,7,11,13,11,21, 28,31,8,15,23,29,16,31,32;
		

Links

• N. J. A. Sloane, Catalog of Toothpick and Cellular Automata Sequences in the OEIS
• Index entries for sequences related to toothpick sequences

Crossrefs

Right border gives A000079.

Cf. A139251, A233782, A233970, A233971.