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A253837 Number of (n+2)X(4+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal sum nondecreasing horizontally, vertically and ne-to-sw antidiagonally 1
28540, 50462, 135011, 284109, 167413, 204420, 196053, 121909, 138562, 139402, 141250, 159838, 168367, 175214, 189876, 201617, 215914, 227036, 250380, 257766, 272217, 298454, 305857, 321184, 358073, 357590, 388392, 415853, 424007, 454393 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A253841
LINKS
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>34
EXAMPLE
Some solutions for n=3
..0..1..0..0..0..0....0..0..0..1..0..1....0..1..1..0..0..0....0..1..0..0..1..0
..0..0..0..0..0..0....1..0..0..1..0..0....1..0..0..0..1..0....0..0..0..0..1..0
..0..0..0..0..1..1....0..0..0..1..1..0....0..0..0..0..1..0....0..1..1..1..1..0
..1..1..1..1..1..1....0..1..1..1..1..1....0..1..1..1..1..0....1..0..0..1..1..1
..1..1..0..1..1..0....0..0..1..1..1..1....1..1..0..0..0..1....1..1..1..1..0..1
CROSSREFS
Sequence in context: A145683 A205890 A186531 * A253844 A253931 A159056
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 16 2015
STATUS
approved

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Last modified April 21 23:54 EDT 2024. Contains 371886 sequences. (Running on oeis4.)