A234229 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 3 (constant-stress 1 X 1 tilings).

5260, 57912, 635904, 7024396, 77499592, 859364784, 9519608332, 106004400596, 1179099470276, 13187924142144, 147315983416148, 1655281003229696, 18571590872945184, 209665693338667564, 2362943030591289236

Offset

1,1

Links

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

R. H. Hardin, Empirical recurrence of order 40

Formula

Empirical recurrence of order 40 (see link above).

Example

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

Crossrefs

Column 2 of A234233.

Sequence in context: A256745 A206165 A206379 * A143936 A204281 A251901

Adjacent sequences: A234226 A234227 A234228 * A234230 A234231 A234232

Keyword

nonn

Author

R. H. Hardin, Dec 21 2013

Status

approved