A254843 Number of (n+2)X(6+2) 0..1 arrays with every 3X3 subblock sum of the medians of the diagonal and antidiagonal minus the two sums of the central row and column nondecreasing horizontally and vertically

293012, 645882, 1102937, 2339906, 4446577, 8565304, 15676281, 28139328, 48596429, 82388048, 136361257, 223504512, 356863993, 570593176, 914443809, 1491899182, 2395605969, 3985181976, 6852332885, 12324434772, 21543373065

Offset

1,1

Comments

Column 6 of A254845

Links

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

Formula

Empirical: a(n) = 8*a(n-1) -29*a(n-2) +64*a(n-3) -77*a(n-4) -56*a(n-5) +511*a(n-6) -1280*a(n-7) +1945*a(n-8) -1672*a(n-9) -379*a(n-10) +4032*a(n-11) -7559*a(n-12) +8728*a(n-13) -6355*a(n-14) +1280*a(n-15) +3836*a(n-16) -6496*a(n-17) +6188*a(n-18) -4096*a(n-19) +1856*a(n-20) -512*a(n-21) +64*a(n-22) for n>54

Example

Some solutions for n=1
..0..0..0..1..1..1..0..1....0..1..0..0..0..0..0..0....0..0..0..0..1..0..1..1
..1..1..1..0..0..0..1..0....0..0..1..1..0..0..1..0....1..0..1..0..0..0..0..1
..0..1..1..1..1..0..1..1....0..0..0..0..1..1..0..1....1..1..0..0..0..1..0..1

Crossrefs

Sequence in context: A219318 A255761 A255754 * A318787 A158124 A050249

Adjacent sequences: A254840 A254841 A254842 * A254844 A254845 A254846

Keyword

nonn

Author

R. H. Hardin, Feb 08 2015

Status

approved