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A256953 Number of (n+2)X(7+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
1640073, 6268245, 12037534, 18040804, 26587024, 38735508, 56306098, 77953860, 108710066, 143899574, 191489068, 248887210, 328813654, 421350126, 546389574, 698911558, 922595390, 1188517170, 1572350918, 2050531494, 2786854414 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 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>37

EXAMPLE

Some solutions for n=1

..0..0..1..0..0..1..1..1..1....0..0..0..0..0..0..0..0..0

..0..0..0..1..0..1..0..1..1....0..0..0..0..1..0..1..1..1

..1..0..0..0..0..0..0..0..1....1..1..1..0..1..1..0..1..0

CROSSREFS

Cf. A256954

Sequence in context: A296450 A255042 A255035 * A205985 A258953 A144127

Adjacent sequences:  A256950 A256951 A256952 * A256954 A256955 A256956

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 13 2015

STATUS

approved

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Last modified May 19 05:05 EDT 2019. Contains 323377 sequences. (Running on oeis4.)