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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 1
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
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 16 2015
STATUS
approved

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Last modified June 12 21:26 EDT 2024. Contains 373360 sequences. (Running on oeis4.)