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%I #14 Nov 25 2013 14:55:53
%S 0,1,3,5,7,11,17,21,23,27,35,43,49,59,73,81,83,87,95,107,123
%N 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.
%C The structure is one of the five wedges of A222180.
%C 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.
%C 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.
%C For more information see A222180.
%C First differs from A152998 at a(10).
%H N. J. A. Sloane, <a href="/wiki/Catalog_of_Toothpick_and_CA_Sequences_in_OEIS">Catalog of Toothpick and Cellular Automata Sequences in the OEIS</a>
%H <a href="/index/To#toothpick">Index entries for sequences related to toothpick sequences</a>
%F a(n) = (A222180(n+1) - 1)/5.
%Y Cf. A139250, A152998, A222172, A222177, A222180.
%K nonn,more
%O 0,3
%A _Omar E. Pol_, Mar 21 2013
%E Name improved by _Omar E. Pol_, Nov 24 2013
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