A222176 - OEIS

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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

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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