A247218 Number of tilings of a 15 X n rectangle using 3n pentominoes of shape I.

1, 1, 1, 1, 1, 34, 95, 190, 325, 506, 3324, 10353, 25607, 55346, 108756, 389216, 1208901, 3281686, 8006108, 17950204, 51430928, 150609259, 419540401, 1090827453, 2651884943, 7077981621, 19691707908, 54499735145, 145671654672, 371632691473, 976543067070

Offset

0,6

Links

Alois P. Heinz, Table of n, a(n) for n = 0..1000

Wikipedia, Pentomino

Crossrefs

Cf. A174249, A233427, A003520, A247117.

Column k=5 of A251072.

Sequence in context: A365248 A202414 A160062 * A233031 A233028 A044221

Adjacent sequences: A247215 A247216 A247217 * A247219 A247220 A247221

Keyword

nonn

Author

Alois P. Heinz, Nov 26 2014

Status

approved