A256951 Number of (n+2)X(5+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

154680, 844499, 2663867, 6304044, 11818550, 18296498, 26587024, 37470100, 53161612, 69050742, 91680642, 119433538, 159000950, 201303722, 261166670, 335773334, 446131442, 569452246, 754791850, 989860526, 1351069110, 1770887594

Offset

1,1

Comments

Column 5 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..1..1..0..0..1..1....0..0..1..0..0..0..1....0..0..1..0..1..1..1
..0..0..0..0..1..1..1....0..0..0..0..1..1..0....1..0..0..0..0..1..0
..0..0..0..1..0..0..1....1..0..0..1..0..0..0....1..0..0..1..0..0..0

Crossrefs

Cf. A256954

Sequence in context: A341212 A255040 A255033 * A101767 A235220 A282163

Adjacent sequences: A256948 A256949 A256950 * A256952 A256953 A256954

Keyword

nonn

Author

R. H. Hardin, Apr 13 2015

Status

approved