A222176 Total number of ON states after n generations of cellular automaton based on pentagons starting near of the vertex of an infinite 72-degree wedge.

0, 1, 3, 5, 7, 11, 17, 21, 23, 27, 35, 43, 49, 59, 73, 81, 83, 87, 95, 107, 123

Offset

0,3

Comments

The structure is one of the five wedges of A222180.

The sequence gives the number of pentagons in the structure after n-th stage. A222177 (the first differences) gives the number of pentagons added at n-th stage.

Also P-toothpick sequence starting near of the vertex of an infinite 72-degree wedge, since each pentagon can be replaced by a P-toothpick.

For more information see A222180.

First differs from A152998 at a(10).

Links

Table of n, a(n) for n=0..20.

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

Index entries for sequences related to toothpick sequences

Formula

a(n) = (A222180(n+1) - 1)/5.

Crossrefs

Cf. A139250, A152998, A222172, A222177, A222180.

Sequence in context: A045397 A211409 A152998 * A331891 A331896 A108539

Adjacent sequences: A222173 A222174 A222175 * A222177 A222178 A222179

Keyword

nonn,more

Author

Omar E. Pol, Mar 21 2013

Extensions

Name improved by Omar E. Pol, Nov 24 2013

Status

approved