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A258521 Number of (n+2)X(3+2) 0..1 arrays with every 3X3 subblock sum of the two sums of the diagonal and antidiagonal minus the two sums of the central column and central row nondecreasing horizontally and vertically 1
6516, 13616, 19920, 25076, 25532, 23907, 23398, 26321, 30168, 33303, 35726, 37801, 40964, 45772, 52250, 58011, 62266, 68264, 77152, 89383, 98654, 107242, 119496, 135431, 157308, 174258, 192562, 217067, 245492, 287238, 320266, 357737, 405498 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A258522

LINKS

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

FORMULA

Empirical: a(n) = a(n-4) +4*a(n-5) -4*a(n-9) -5*a(n-10) +5*a(n-14) +2*a(n-15) -2*a(n-19) for n>39

EXAMPLE

Some solutions for n=4

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

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

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

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

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

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

CROSSREFS

Cf. A258522

Sequence in context: A251447 A156416 A156418 * A068270 A216666 A260979

Adjacent sequences:  A258518 A258519 A258520 * A258522 A258523 A258524

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jun 01 2015

STATUS

approved

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Last modified January 24 13:24 EST 2020. Contains 331193 sequences. (Running on oeis4.)