A254841 Number of (n+2)X(4+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

30182, 117706, 340387, 701614, 1308339, 2339906, 3986282, 6690291, 10891568, 17356772, 28121949, 46400232, 75439506, 121698683, 210485020, 384258039, 680687166, 1186268774, 2282821919, 4618153004, 8753286493, 16014990005

Offset

1,1

Comments

Column 4 of A254845

Links

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

Formula

Empirical: a(n) = 6*a(n-1) -17*a(n-2) +33*a(n-3) -30*a(n-4) -61*a(n-5) +285*a(n-6) -618*a(n-7) +911*a(n-8) -784*a(n-9) +7*a(n-10) +1268*a(n-11) -2683*a(n-12) +3502*a(n-13) -3369*a(n-14) +2710*a(n-15) -1886*a(n-16) +1406*a(n-17) -1314*a(n-18) +891*a(n-19) +13*a(n-20) -1337*a(n-21) +2744*a(n-22) -3452*a(n-23) +3356*a(n-24) -2668*a(n-25) +1664*a(n-26) -832*a(n-27) +320*a(n-28) -64*a(n-29) for n>53

Example

Some solutions for n=2
..0..0..0..0..1..0....1..1..1..0..1..1....0..1..1..1..0..1....1..1..1..0..0..0
..1..1..1..1..0..0....0..1..1..0..0..0....1..1..1..1..0..0....1..0..1..1..0..1
..0..1..1..1..0..1....0..1..0..0..0..0....1..1..0..0..1..0....0..1..0..0..0..0
..1..1..0..0..0..1....1..1..0..0..0..1....1..0..1..1..1..1....0..1..0..0..0..1

Crossrefs

Sequence in context: A298429 A255759 A255752 * A247855 A113286 A355279

Adjacent sequences: A254838 A254839 A254840 * A254842 A254843 A254844

Keyword

nonn

Author

R. H. Hardin, Feb 08 2015

Status

approved