A146281 - OEIS

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A146281

Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 111-110-111 pattern in any orientation.

1, 1, 3, 1, 7, 1, 67, 73, 795, 747, 59843, 10661, 2722871, 192335, 266731999, 104050525, 63050333629, 28433577797, 53230363866129, 6321654487737, 49591407282435513, 2463615767533037, 72391673108224685819 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,3`
	LINKS	`Table of n, a(n) for n=1..23.`
	EXAMPLE	`Maximal 8 X 8 example` `.0.0.0.0.0.0.0.0` `.1.1.1.0.0.1.1.1` `.0.1.1.0.0.1.1.0` `.1.1.1.0.0.1.1.1` `.0.0.0.0.0.0.0.0` `.1.0.1.0.0.1.0.1` `.1.1.1.0.0.1.1.1` `.1.1.1.0.0.1.1.1`
	CROSSREFS	`Sequence in context: A350802 A331884 A146430 * A146265 A146217 A146007` `Adjacent sequences: A146278 A146279 A146280 * A146282 A146283 A146284`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin`
	STATUS	`approved`

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Last modified December 10 22:05 EST 2023. Contains 367717 sequences. (Running on oeis4.)