A256952 Number of (n+2)X(6+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the central row and central column minus the two minimums of the diagonal and antidiagonal nondecreasing horizontally and vertically

516998, 2396710, 6028589, 11484877, 18296498, 27007866, 38735508, 53251874, 73958136, 97824928, 128991426, 167772052, 221476438, 285166026, 367014334, 471769634, 625566218, 813883562, 1067212638, 1401014718, 1916744082

Offset

1,1

Comments

Column 6 of A256954

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Formula

Empirical: a(n) = 2*a(n-1) -2*a(n-3) +7*a(n-4) -11*a(n-5) -2*a(n-6) +12*a(n-7) -12*a(n-8) +9*a(n-9) +12*a(n-10) -16*a(n-11) -4*a(n-12) +14*a(n-13) -16*a(n-14) +16*a(n-16) -8*a(n-17) for n>35

Example

Some solutions for n=1
..0..0..1..1..0..0..0..0....0..0..1..0..0..0..1..0....0..0..1..1..0..0..1..0
..0..0..0..1..0..0..1..0....1..0..1..0..1..1..1..0....0..0..0..1..0..1..1..0
..1..1..0..0..1..1..0..1....1..1..0..1..1..1..1..0....1..1..0..1..1..1..0..0

Crossrefs

Cf. A256954

Sequence in context: A048527 A255041 A255034 * A234173 A226287 A251834

Adjacent sequences: A256949 A256950 A256951 * A256953 A256954 A256955

Keyword

nonn

Author

R. H. Hardin, Apr 13 2015

Status

approved