A151533 Number of 2-sided strip polypons with n cells.

1, 2, 1, 3, 2, 5, 4, 9, 8, 16, 16, 28, 30, 51, 58, 96, 112, 179, 216, 334, 406, 624, 776, 1178, 1472, 2216, 2796, 4163, 5260, 7833, 9964, 14755, 18756, 27762, 35400, 52148, 66450, 98028, 125168, 184069, 234768, 345636, 441332, 647994, 826564, 1215424

Offset

1,2

Links

Table of n, a(n) for n=1..46.

Ed Pegg, Jr., Illustrations of polyforms

Eric Weisstein's World of Mathematics, Polypon

Crossrefs

Cf. A057784, A151531, A151532.

Sequence in context: A181531 A034393 A068932 * A128100 A035579 A045931

Adjacent sequences: A151530 A151531 A151532 * A151534 A151535 A151536

Keyword

nonn,hard

Author

Ed Pegg Jr, May 13 2009

Extensions

a(21)-a(46) from Joseph Myers, Oct 02 2011

Status

approved