A234478 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 1 (constant-stress 1 X 1 tilings).

95872, 2765648, 87871120, 2941603932, 101383587816, 3555453917560, 125966139330824, 4492285883423076, 160824570377394016, 5773259968701864120, 207553467686691838528, 7471009938914959605184, 269067241891021791894672

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..141

Example

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

Crossrefs

Column 3 of A234481.

Sequence in context: A235564 A175598 A078518 * A130001 A253747 A253754

Adjacent sequences: A234475 A234476 A234477 * A234479 A234480 A234481

Keyword

nonn

Author

R. H. Hardin, Dec 26 2013

Status

approved