A254302 Number of (n+2)X(4+2) 0..1 arrays with every 3X3 subblock sum of the two maximums of the diagonal and antidiagonal minus the sum of the minimums of the central row and column nondecreasing horizontally and vertically

54236, 460326, 2530381, 9867433, 43077907, 170114970, 668843106, 2655696397, 10186556028, 39428714311, 153393275855, 592814496834, 2316369543431, 9061294492431, 35700454361888, 141347956289020, 563699122839800

Offset

1,1

Comments

Column 4 of A254306

Links

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

Formula

Empirical: a(n) = 6*a(n-1) +26*a(n-2) -146*a(n-3) -455*a(n-4) +1154*a(n-5) +6767*a(n-6) -2920*a(n-7) -42605*a(n-8) -35406*a(n-9) +58183*a(n-10) -151832*a(n-11) +683871*a(n-12) +6499614*a(n-13) +4735393*a(n-14) -51112984*a(n-15) -114140326*a(n-16) +136292264*a(n-17) +742062187*a(n-18) +366233074*a(n-19) -2329427252*a(n-20) -3608482848*a(n-21) +2542915684*a(n-22) +10811253048*a(n-23) +4756583856*a(n-24) -13607504608*a(n-25) -16300351552*a(n-26) -3936912896*a(n-27) +13639591168*a(n-28) +27310157824*a(n-29) +12147660800*a(n-30) -23610398720*a(n-31) -27889451008*a(n-32) -1292050432*a(n-33) +10694885376*a(n-34) +14263123968*a(n-35) +8161329152*a(n-36) -7736918016*a(n-37) -9831972864*a(n-38) +2157969408*a(n-39) +3774873600*a(n-40) -1207959552*a(n-41) for n>51

Example

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

Crossrefs

Sequence in context: A224618 A254263 A254256 * A202315 A270763 A251479

Adjacent sequences: A254299 A254300 A254301 * A254303 A254304 A254305

Keyword

nonn

Author

R. H. Hardin, Jan 27 2015

Status

approved