A359523 - OEIS

A359523

Number of free polyiamonds of n cells with multiply-connected interiors.

1, 2, 12, 51, 217, 846, 3211 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`12,2`
	LINKS	`Table of n, a(n) for n=12..18.`
	FORMULA	`a(n) = A070764(n) - A359524(n).`
	CROSSREFS	`Cf. A000577, A070764, A359519, A359524.` `Sequence in context: A012695 A012382 A198008 * A323851 A054667 A009537` `Adjacent sequences: A359520 A359521 A359522 * A359524 A359525 A359526`
	KEYWORD	`nonn,more`
	AUTHOR	`John Mason, Jan 05 2023`
	STATUS	`approved`

Last modified March 23 17:52 EDT 2023. Contains 361449 sequences. (Running on oeis4.)