A151527 Number of 2-sided strip polyrects with n cells.

1, 2, 3, 6, 12, 26, 57, 130, 297, 694, 1622, 3810, 8966, 21092, 49732, 116952, 275695, 647788, 1525610, 3581170, 8424478, 19757082, 46425561

Offset

1,2

Links

Table of n, a(n) for n=1..23.

Ed Pegg, Jr., Illustrations of polyforms

Eric Weisstein's World of Mathematics, Polyrect

Crossrefs

Sequence in context: A259098 A367386 A166296 * A375099 A086625 A152172

Adjacent sequences: A151524 A151525 A151526 * A151528 A151529 A151530

Keyword

nonn,hard,more

Author

Ed Pegg Jr, May 13 2009

Extensions

a(15)-a(23) from Joseph Myers, Nov 22 2010

Status

approved