A234230 Number of (n+1) X (3+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3 (constant-stress 1 X 1 tilings).

48592, 635904, 8260920, 108591688, 1418241440, 18729039912, 245685138024, 3261204356760, 42973192245160, 573587040137608, 7594066023919576, 101963002303378792, 1356695275793927016, 18330899102362639544

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..135

Example

Some solutions for n=1:
  7 2 3 1     0 3 4 4     3 4 5 2     2 1 0 1     6 3 5 2
  4 2 6 7     4 4 2 5     0 4 2 2     1 3 5 3     7 7 6 0

Crossrefs

Column 3 of A234233.

Sequence in context: A223935 A278020 A237105 * A251597 A228676 A268852

Adjacent sequences: A234227 A234228 A234229 * A234231 A234232 A234233

Keyword

nonn

Author

R. H. Hardin, Dec 21 2013

Status

approved