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 A258537 Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum or central row sum equal to the central column sum 1
 220, 2916, 20736, 161604, 726880, 4359744, 15444224, 78039556, 238216520, 1091641600, 3064541952, 13194657424, 35313510072, 145324113796, 378585527360, 1503409490496, 3856470856448, 14877667836964, 37794053212800 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A258545 LINKS R. H. Hardin, Table of n, a(n) for n = 1..23 EXAMPLE Some solutions for n=4 ..0..1..1..1..1..0....1..0..0..0..0..0....1..1..0..1..1..0....1..1..0..1..0..1 ..1..1..0..0..1..0....1..1..1..1..1..0....1..1..1..1..0..0....0..1..0..0..0..0 ..0..1..1..1..1..0....0..0..0..0..0..1....0..0..0..1..1..0....0..1..0..1..1..1 ..1..1..0..0..1..0....1..1..1..1..1..0....1..1..1..1..0..0....0..1..0..0..0..1 ..0..1..1..1..1..0....0..0..0..0..0..1....0..0..0..1..1..0....0..1..0..1..1..1 ..0..1..0..0..1..1....1..0..1..1..1..1....0..1..1..1..0..0....0..1..1..0..1..1 CROSSREFS Cf. A258545 Sequence in context: A257353 A211820 A215491 * A027797 A055663 A333139 Adjacent sequences:  A258534 A258535 A258536 * A258538 A258539 A258540 KEYWORD nonn AUTHOR R. H. Hardin, Jun 02 2015 STATUS approved

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Last modified November 30 13:27 EST 2021. Contains 349419 sequences. (Running on oeis4.)