A255761 Number of (6+2)X(n+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, vertically and ne-to-sw antidiagonally

293012, 156658, 108201, 177281, 237248, 473630, 652833, 1289436, 2035202, 4063736, 6925353, 13000120, 22368324, 42237154, 75237569, 135754954, 239450238, 455962216, 854685889, 1574304740, 2916053420, 5816374182, 11500663421

Offset

1,1

Comments

Row 6 of A255756

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

Crossrefs

Cf. A255756

Sequence in context: A168500 A104328 A219318 * A255754 A254843 A318787

Adjacent sequences: A255758 A255759 A255760 * A255762 A255763 A255764

Keyword

nonn

Author

R. H. Hardin, Mar 05 2015

Status

approved