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 A258524 Number of (n+2)X(2+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the central row and central column plus the two minimums of the diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
 2812, 16473, 85259, 342157, 1323419, 5390288, 22067757, 92613188, 396688542, 1711246125, 7414499804, 32162200369, 139646322721, 607180535028, 2641162279255, 11488782106466, 49977384656614, 217425089392595 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A258530 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 4*a(n-1) +10*a(n-2) -36*a(n-3) +8*a(n-4) +12*a(n-5) -350*a(n-6) -716*a(n-7) +3953*a(n-8) +7248*a(n-9) -17127*a(n-10) -23348*a(n-11) +30919*a(n-12) +34304*a(n-13) -19502*a(n-14) -21012*a(n-15) +2114*a(n-16) +5456*a(n-17) -41363*a(n-18) -6768*a(n-19) +95727*a(n-20) -17116*a(n-21) -31961*a(n-22) +47256*a(n-23) -92118*a(n-24) -26560*a(n-25) +102964*a(n-26) +2488*a(n-27) -39794*a(n-28) -3056*a(n-29) +7313*a(n-30) +2120*a(n-31) -808*a(n-32) -292*a(n-33) +16*a(n-34) +16*a(n-35) for n>40 EXAMPLE Some solutions for n=3 ..0..1..1..0....1..0..0..0....1..0..0..0....0..1..0..1....0..0..1..1 ..0..1..0..1....0..0..0..0....1..0..0..0....0..1..0..0....0..0..1..1 ..0..1..0..1....0..0..0..0....1..0..1..0....0..1..1..1....1..0..0..1 ..0..0..1..1....0..1..1..0....1..0..1..1....0..1..1..0....0..1..1..1 ..0..0..1..1....0..1..0..0....1..1..1..0....0..0..0..1....1..1..0..0 CROSSREFS Cf. A258530 Sequence in context: A252048 A254254 A254261 * A258531 A254300 A254916 Adjacent sequences:  A258521 A258522 A258523 * A258525 A258526 A258527 KEYWORD nonn AUTHOR R. H. Hardin, Jun 02 2015 STATUS approved

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Last modified August 1 15:44 EDT 2021. Contains 346393 sequences. (Running on oeis4.)