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 A258532 Number of (3+2)X(n+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
 14184, 85259, 523716, 3133384, 18460629, 106485657, 606576800, 3416159956, 19226604054, 108024515196, 607457990432, 3414790673649, 19206077118085, 108039270365307, 607889560061188, 3420580168661212, 19249140658467974 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 3 of A258530 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 12*a(n-1) -38*a(n-2) -32*a(n-3) +379*a(n-4) -1168*a(n-5) +2072*a(n-6) +4756*a(n-7) -10786*a(n-8) -29864*a(n-9) -1812*a(n-10) +80000*a(n-11) -657762*a(n-12) +3299328*a(n-13) +2102472*a(n-14) -12998648*a(n-15) -116749*a(n-16) -30229796*a(n-17) -68744086*a(n-18) +148872448*a(n-19) +1158685607*a(n-20) -444634768*a(n-21) -3636584816*a(n-22) +624070596*a(n-23) -8066581456*a(n-24) +11290519264*a(n-25) +53521763936*a(n-26) -16292626368*a(n-27) -104210784704*a(n-28) -146719887872*a(n-29) +245882904832*a(n-30) +254599577600*a(n-31) -383082742784*a(n-32) +645842774016*a(n-33) -801745596416*a(n-34) -1232390627328*a(n-35) +2690572042240*a(n-36) -1429994373120*a(n-37) -125407264768*a(n-38) +2861540048896*a(n-39) -4771857039360*a(n-40) +1722833960960*a(n-41) +2003257262080*a(n-42) -3508692582400*a(n-43) +3703117447168*a(n-44) -1069874675712*a(n-45) -1947868332032*a(n-46) +2181642059776*a(n-47) -1265069195264*a(n-48) +267093278720*a(n-49) +576062488576*a(n-50) -541165879296*a(n-51) +137438953472*a(n-52) for n>58 EXAMPLE Some solutions for n=2 ..0..0..0..0....0..0..1..1....0..0..1..1....0..1..1..0....1..0..0..1 ..0..0..1..0....0..0..0..1....1..0..1..1....1..1..0..1....0..0..0..0 ..0..0..1..0....1..1..1..1....1..0..0..1....0..0..1..1....0..1..1..1 ..0..1..1..1....0..0..1..0....1..1..1..0....0..0..1..0....0..1..0..1 ..0..1..1..1....1..1..1..0....1..1..0..0....1..1..0..0....0..0..0..1 CROSSREFS Cf. A258530 Sequence in context: A184565 A251068 A184559 * A258525 A254917 A270800 Adjacent sequences: A258529 A258530 A258531 * A258533 A258534 A258535 KEYWORD nonn AUTHOR R. H. Hardin, Jun 02 2015 STATUS approved

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Last modified February 27 14:46 EST 2024. Contains 370376 sequences. (Running on oeis4.)