A254812 - OEIS

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A254812

Number of (n+2) X (n+2) 0..1 arrays with every 3 X 3 subblock sum of four medians of central row, central column, diagonal and antidiagonal nondecreasing horizontally and vertically.

512, 15848, 748444, 52855290, 5252066348, 913402797416, 217878991008870, 84913090550322584, 49469250115481261672 (list; graph; refs; listen; history; text; internal format)

	OFFSET	`1,1`
	COMMENTS	`Diagonal of A254819.`
	LINKS	`Table of n, a(n) for n=1..9.`
	EXAMPLE	`Some solutions for n=2` `..0..1..0..1....0..0..0..0....0..1..0..0....0..0..1..1....0..1..0..0` `..1..1..0..0....1..0..1..0....0..0..1..0....0..1..0..1....0..0..0..0` `..0..1..0..1....0..0..1..1....0..1..1..0....0..1..1..1....0..0..0..0` `..0..1..1..1....0..1..1..1....1..0..1..1....0..0..1..0....0..1..1..1`
	CROSSREFS	`Cf. A254819.` `Sequence in context: A254720 A254252 A200791 * A329894 A258523 A257147` `Adjacent sequences: A254809 A254810 A254811 * A254813 A254814 A254815`
	KEYWORD	`nonn`
	AUTHOR	`R. H. Hardin, Feb 08 2015`
	STATUS	`approved`

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Last modified March 29 14:52 EDT 2023. Contains 361599 sequences. (Running on oeis4.)