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 A258529 Number of (n+2)X(7+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
 5646340, 85453855, 606576800, 455126938, 1319588040, 2229175182, 6279181504, 24590578112, 74615867948, 254672251620, 915694420572, 3440264796428, 11988270391004, 46671912507372, 175174970747004, 672219663494924 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 7 of A258530 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 4*a(n-1) +19*a(n-2) -46*a(n-3) -184*a(n-4) -384*a(n-5) +2800*a(n-6) -32*a(n-7) -8320*a(n-8) +27136*a(n-9) +38400*a(n-10) -120832*a(n-11) -1331200*a(n-12) +1327104*a(n-13) +5701632*a(n-14) +2752512*a(n-15) -20971520*a(n-16) -20971520*a(n-17) +67108864*a(n-18) -33554432*a(n-19) for n>30 EXAMPLE Some solutions for n=1 ..0..0..0..1..1..0..1..1..0....0..0..0..0..1..1..1..1..0 ..1..0..0..1..0..1..1..0..1....0..0..0..1..0..0..1..1..0 ..0..0..0..0..0..0..0..1..1....0..1..0..0..0..0..0..0..0 CROSSREFS Cf. A258530 Sequence in context: A114685 A234174 A258536 * A254921 A290162 A251018 Adjacent sequences: A258526 A258527 A258528 * A258530 A258531 A258532 KEYWORD nonn AUTHOR R. H. Hardin, Jun 02 2015 STATUS approved

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Last modified December 7 17:10 EST 2023. Contains 367658 sequences. (Running on oeis4.)