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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 1
516998, 2396710, 6028589, 11484877, 18296498, 27007866, 38735508, 53251874, 73958136, 97824928, 128991426, 167772052, 221476438, 285166026, 367014334, 471769634, 625566218, 813883562, 1067212638, 1401014718, 1916744082 (list; graph; refs; listen; history; text; internal format)
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

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Last modified June 29 07:33 EDT 2022. Contains 354910 sequences. (Running on oeis4.)