A151540 Number of 1-sided triangular strip polyedges with n cells.

1, 3, 14, 54, 239, 1007, 4375, 18728, 80572, 344651, 1473402, 6280556, 26732173, 113570050, 481832209, 2041461824, 8639576140, 36524803606, 154269617690, 651036955831, 2745359144355

Offset

1,2

Links

Table of n, a(n) for n=1..21.

Ed Pegg, Jr., Illustrations of polyforms

Eric Weisstein's World of Mathematics, Polyedge

Crossrefs

Cf. A151539, A151541, A159867.

Sequence in context: A166680 A104191 A318125 * A226466 A363964 A322938

Adjacent sequences: A151537 A151538 A151539 * A151541 A151542 A151543

Keyword

nonn,hard,more

Author

Ed Pegg Jr, May 13 2009

Extensions

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

a(14)-a(21) from Bert Dobbelaere, Mar 23 2025

Status

approved