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A253839

Number of (n+2)X(6+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally.

263476, 308576, 654021, 1139506, 237202, 295098, 225776, 103499, 121541, 121166, 116836, 127015, 140669, 134619, 147544, 162628, 159254, 167587, 193122, 178905, 199064, 221897, 209560, 227375, 255465, 238491, 271541, 287915, 281716, 308658

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 6 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..0..1..1..1..0....0..0..0..0..1..1..1..1....0..0..0..1..0..0..0..1

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

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

CROSSREFS

Sequence in context: A170801 A340907 A253846 * A253933 A237778 A123138

Adjacent sequences: A253836 A253837 A253838 * A253840 A253841 A253842

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 16 2015

STATUS

approved

URL: https://oeis.org/A253839

⇱ A253839 - OEIS