

A222176


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


3



0, 1, 3, 5, 7, 11, 17, 21, 23, 27, 35, 43, 49, 59, 73, 81, 83, 87, 95, 107, 123
(list;
graph;
refs;
listen;
history;
text;
internal format)



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 nth stage. A222177 (the first differences) gives the number of pentagons added at nth stage.
Also Ptoothpick sequence starting near of the vertex of an infinite 72degree wedge, since each pentagon can be replaced by a Ptoothpick.
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 * A108539 A170886 A238137
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



