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A256950 Number of (n+2)X(4+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
42890, 262251, 1015815, 2782301, 6304044, 11484877, 18040804, 26715881, 40022560, 56292649, 77255078, 102627725, 141269994, 188430201, 250036700, 319805527, 432798068, 574133619, 765221004, 970037933, 1331064994, 1795685605 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A256954

LINKS

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

FORMULA

Empirical: a(n) = 2*a(n-1) -a(n-2) +a(n-3) +5*a(n-4) -12*a(n-5) +5*a(n-6) -6*a(n-7) -a(n-8) +16*a(n-9) -a(n-10) +7*a(n-11) -13*a(n-12) -2*a(n-13) -13*a(n-14) +6*a(n-15) +2*a(n-16) +12*a(n-17) +2*a(n-18) -8*a(n-19) +8*a(n-20) -16*a(n-21) +8*a(n-22) for n>39

EXAMPLE

Some solutions for n=1

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

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

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

CROSSREFS

Cf. A256954

Sequence in context: A014892 A255039 A255032 * A237847 A236984 A008850

Adjacent sequences:  A256947 A256948 A256949 * A256951 A256952 A256953

KEYWORD

nonn

AUTHOR

R. H. Hardin, Apr 13 2015

STATUS

approved

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Last modified August 15 22:45 EDT 2022. Contains 356150 sequences. (Running on oeis4.)