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A151541 Number of 2-sided triangular strip polyedges with n cells. 4
1, 3, 8, 32, 123, 523, 2201, 9443, 40341, 172649, 736926, 3141607, 13367012 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..13.

Ed Pegg, Jr., Illustrations of polyforms

Eric Weisstein's World of Mathematics, Polyedge

CROSSREFS

Cf. A151539, A151540, A159867.

Sequence in context: A148913 A148914 A148915 * A022563 A103939 A094610

Adjacent sequences:  A151538 A151539 A151540 * A151542 A151543 A151544

KEYWORD

nonn,hard,more

AUTHOR

Ed Pegg Jr, May 13 2009

EXTENSIONS

a(9)-a(13) from Joseph Myers, Oct 05 2011

STATUS

approved

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Last modified July 22 18:10 EDT 2017. Contains 289671 sequences.