A268416 Number of aligned free polyominoes that will fit in a square of size n X n.

1, 4, 35, 1280, 262292, 205515653

Offset

1,2

Comments

a(n) is the number of free polyominoes that have both width and height <= n. Compare this to Craig Knecht's A268311 which has both height and width = n. The word "aligned" in the title refers to the restriction that the polyominoes have edges parallel to the sides of the square, in contrast with A268427.

Links

Table of n, a(n) for n=1..6.

Crossrefs

Cf. A268311, A268427.

Sequence in context: A192012 A076818 A005026 * A268427 A123745 A183882

Adjacent sequences: A268413 A268414 A268415 * A268417 A268418 A268419

Keyword

nonn,more

Author

John Mason, Feb 04 2016

Extensions

a(6) from Talmon Silver, Jul 29 2020

Status

approved