A260493 - OEIS

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A260493

Number of (n+2)X(n+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 00000011 or 00001011

48, 136, 868, 3603, 5848, 31078, 155232, 356236, 1433220, 8676027, 28104408, 96675895, 569988256, 2581001066, 9580891800, 49283809387, 267771460624 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	COMMENTS	`Diagonal of A260501`
	LINKS	`Table of n, a(n) for n=1..17.`
	EXAMPLE	`Some solutions for n=4` `..1..0..0..1..0..0....1..1..0..0..1..1....1..1..0..0..0..1....1..0..0..0..0..0` `..1..0..0..1..0..0....0..1..0..0..1..0....0..1..0..0..1..0....1..1..0..0..1..0` `..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..1` `..0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..0....0..0..0..0..0..1` `..0..0..1..1..0..0....0..1..1..0..0..1....0..1..0..0..1..0....0..0..1..0..0..0` `..0..0..0..0..0..0....0..0..0..0..0..0....1..1..0..0..0..1....0..0..1..0..1..1`
	CROSSREFS	`Cf. A260501` `Sequence in context: A260833 A260972 A244380 * A003502 A129428 A039496` `Adjacent sequences: A260490 A260491 A260492 * A260494 A260495 A260496`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin, Jul 27 2015`
	STATUS	`approved`

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Last modified March 23 15:56 EDT 2023. Contains 361445 sequences. (Running on oeis4.)