A252121 T(n,k)=Number of (n+2)X(k+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum less than 6.

41092, 1091710, 1091710, 30699048, 83930022, 30699048, 845139814, 6987308056, 6987308056, 845139814, 23117206344, 542424609174, 1675983810394, 542424609174, 23117206344, 633958684608, 42424000928232, 373564978470681

Offset

1,1

Comments

Table starts

..........41092..........1091710..........30699048..........845139814

........1091710.........83930022........6987308056.......542424609174

.......30699048.......6987308056.....1675983810394....373564978470681

......845139814.....542424609174...373564978470681.237151750138962995

....23117206344...42424000928232.84633516398482856

...633958684608.3354373190670870

.17408568411762

Links

R. H. Hardin, Table of n, a(n) for n = 1..31

Example

Some solutions for n=1 k=4
..0..0..0..0..0..1....0..0..0..1..0..0....0..0..0..1..0..0....0..0..0..0..1..0
..0..0..0..2..1..0....0..0..0..2..3..0....0..0..0..1..1..1....0..0..0..0..1..0
..0..1..0..0..1..2....0..0..0..0..1..0....0..1..0..0..2..2....0..0..0..1..0..0

Crossrefs

Sequence in context: A141711 A074379 A237395 * A252118 A250819 A234546

Adjacent sequences: A252118 A252119 A252120 * A252122 A252123 A252124

Keyword

nonn,tabl

Author

R. H. Hardin, Dec 14 2014

Status

approved