A328020 Number of distinct tilings of an n X n square with free n-polyominoes.

1, 1, 2, 22, 515, 56734, 19846102, 23437350133

Offset

1,3

Links

Table of n, a(n) for n=1..8.

Jeff Bowermaster, Illustration of a(1)..a(4)

Jeff Bowermaster, Illustration of a(5)

Code Golf Stack Exchange, Number of distinct tilings of an n X n square with free n-polyominoes

Crossrefs

Cf. A172477, A268427, A291806.

Sequence in context: A090730 A090313 A110129 * A246740 A248798 A120419

Adjacent sequences: A328017 A328018 A328019 * A328021 A328022 A328023

Keyword

nonn,hard,more,nice

Author

Jeff Bowermaster, Oct 01 2019

Extensions

a(7) from Peter Kagey, Oct 10 2019, based on the Stack Exchange link.

a(8) from Christian Sievers, Oct 13 2019, based on the Stack Exchange link.

Status

approved