A247776 Number of tilings of a 5 X n rectangle using n pentominoes of any but the Y shape.

1, 1, 5, 44, 321, 2404, 14692, 98831, 684729, 4642752, 31650422, 213894450, 1451388234, 9868405649, 66968132029, 454745989239, 3086695784357, 20954497956277, 142275120134328, 965860855067492, 6557295186301572, 44517125016379779, 302224231486908372

Offset

0,3

Links

Alois P. Heinz, Table of n, a(n) for n = 0..500

Wikipedia, Pentomino

Crossrefs

Column k=0 of A247712.

Cf. A174249, A233427.

Sequence in context: A268762 A068311 A109984 * A374300 A227640 A096355

Adjacent sequences: A247773 A247774 A247775 * A247777 A247778 A247779

Keyword

nonn

Author

Alois P. Heinz, Sep 23 2014

Status

approved