A234552 Number of (n+1) X (3+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 3 (constant-stress 1 X 1 tilings).

20416, 184816, 1659728, 15022720, 135896344, 1236987584, 11259287952, 103178794676, 945421176696, 8728777849856, 80564597517120, 749961596817872, 6976731437481296, 65526946754262876, 614749169773668664

Offset

1,1

Links

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

Example

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

Crossrefs

Column 3 of A234555.

Sequence in context: A103912 A256104 A269279 * A223466 A281658 A234304

Adjacent sequences: A234549 A234550 A234551 * A234553 A234554 A234555

Keyword

nonn

Author

R. H. Hardin, Dec 28 2013

Status

approved