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 A254565 Number of (n+2)X(5+2) 0..1 arrays with every 3X3 subblock sum of the four sums of the central row, central column, diagonal and antidiagonal nondecreasing horizontally and vertically 1
 116056, 536906, 2647806, 4796417, 10679860, 25591173, 45085796, 101378800, 196258426, 401333712, 788651082, 1539724687, 2943252490, 5549226489, 10301160312, 18857921168, 34041174352, 60655369674, 106683727874 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 5 of A254568 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 11*a(n-1) -54*a(n-2) +166*a(n-3) -407*a(n-4) +945*a(n-5) -2046*a(n-6) +3894*a(n-7) -6831*a(n-8) +11693*a(n-9) -18832*a(n-10) +27864*a(n-11) -39776*a(n-12) +55384*a(n-13) -71820*a(n-14) +87780*a(n-15) -105621*a(n-16) +120879*a(n-17) -127006*a(n-18) +128678*a(n-19) -126225*a(n-20) +109087*a(n-21) -81818*a(n-22) +55242*a(n-23) -21186*a(n-24) -21186*a(n-25) +55242*a(n-26) -81818*a(n-27) +109087*a(n-28) -126225*a(n-29) +128678*a(n-30) -127006*a(n-31) +120879*a(n-32) -105621*a(n-33) +87780*a(n-34) -71820*a(n-35) +55384*a(n-36) -39776*a(n-37) +27864*a(n-38) -18832*a(n-39) +11693*a(n-40) -6831*a(n-41) +3894*a(n-42) -2046*a(n-43) +945*a(n-44) -407*a(n-45) +166*a(n-46) -54*a(n-47) +11*a(n-48) -a(n-49) for n>63 polynomial of degree 23 plus a quasipolynomial of degree 11 with period 6 for n>14 (see link above) EXAMPLE Some solutions for n=1 ..1..0..0..1..0..1..0....0..1..1..0..0..0..1....1..1..0..0..0..1..0 ..1..0..0..0..0..1..0....0..0..0..1..1..1..0....0..0..0..1..0..1..1 ..0..0..0..1..0..1..0....0..1..0..1..1..0..1....0..1..0..1..0..1..1 CROSSREFS Sequence in context: A346863 A255950 A273660 * A237479 A154065 A206471 Adjacent sequences: A254562 A254563 A254564 * A254566 A254567 A254568 KEYWORD nonn AUTHOR R. H. Hardin, Feb 01 2015 STATUS approved

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Last modified February 1 15:00 EST 2023. Contains 359993 sequences. (Running on oeis4.)