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

1,3

Links

Table of n, a(n) for n=1..75.

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

Index entries for sequences related to toothpick sequences

Example

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;

Crossrefs

Right border gives A000079.

Cf. A139251, A233782, A233970, A233971.

Sequence in context: A358085 A357443 A233782 * A169778 A309776 A255560

Adjacent sequences: A233969 A233970 A233971 * A233973 A233974 A233975

Keyword

nonn,tabf

Author

Omar E. Pol, Dec 18 2013

Status

approved