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A253840 Number of (n+2)X(7+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
709704, 697720, 1364704, 2282367, 350208, 427510, 262418, 145955, 159924, 165378, 151496, 166465, 184418, 173844, 187098, 210280, 195700, 212600, 237946, 221027, 242064, 271568, 250134, 276274, 302350, 286349, 315658, 340910, 325612, 359818 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 7 of A253841

LINKS

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

R. H. Hardin, polynomial of degree 4 plus a quasipolynomial of degree 2 with period 24

FORMULA

Empirical: a(n) = 2*a(n-1) -a(n-2) +2*a(n-6) -4*a(n-7) +3*a(n-8) -2*a(n-9) +a(n-10) -a(n-12) +2*a(n-13) -3*a(n-14) +4*a(n-15) -2*a(n-16) +a(n-20) -2*a(n-21) +a(n-22) for n>35

EXAMPLE

Some solutions for n=1

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

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

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

CROSSREFS

Sequence in context: A236277 A251378 A253847 * A253934 A083613 A284166

Adjacent sequences:  A253837 A253838 A253839 * A253841 A253842 A253843

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 16 2015

STATUS

approved

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Last modified January 20 11:11 EST 2020. Contains 331083 sequences. (Running on oeis4.)