A234477 Number of (n+1) X (2+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).

7840, 141728, 2765648, 56172656, 1165600828, 24484032192, 517788509004, 10996717871928, 234081623047024, 4991134242744276, 106505167261928932, 2274481051607364768, 48584502628043230124, 1038273815225245627876

Offset

1,1

Links

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

R. H. Hardin, Empirical recurrence of order 46

Formula

Empirical recurrence of order 46 (see link above).

Example

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

Crossrefs

Column 2 of A234481.

Sequence in context: A252317 A250026 A194352 * A286181 A045277 A099498

Adjacent sequences: A234474 A234475 A234476 * A234478 A234479 A234480

Keyword

nonn

Author

R. H. Hardin, Dec 26 2013

Status

approved