A254515 Number of (4+2)X(n+2) 0..1 arrays with every 3X3 subblock sum of four medians of central row, central column, diagonal and antidiagonal nondecreasing horizontally, vertically and ne-to-sw antidiagonally

55904, 356061, 2290520, 14550580, 98841764, 655621406, 4236936385, 27317279531, 173846791901, 1101346479953, 6937210408938, 43612074196451, 273183503345418, 1707664140081090, 10638559906896711, 66078961499998778, 408919585817852038

Offset

1,1

Comments

Row 4 of A254512

Links

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

Example

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

Crossrefs

Sequence in context: A205093 A206081 A254508 * A254815 A229436 A022224

Adjacent sequences: A254512 A254513 A254514 * A254516 A254517 A254518

Keyword

nonn

Author

R. H. Hardin, Jan 31 2015

Status

approved