A359524 Number of free holey polyiamonds of n cells with simply-connected interiors.

1, 4, 25, 107, 448, 1701, 6216, 21771, 74339, 248379

Offset

9,2

Links

Table of n, a(n) for n=9..18.

Formula

a(n) = A070764(n) - A359523(n).

Crossrefs

Cf. A000577, A070764, A359520, A359523.

Sequence in context: A329495 A042651 A225692 * A070764 A327646 A244746

Adjacent sequences: A359521 A359522 A359523 * A359525 A359526 A359527

Keyword

nonn,more

Author

John Mason, Jan 05 2023

Status

approved