A234894 Number of (n+1) X (4+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 1, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

16572, 115924, 743436, 5941320, 44518632, 385262124, 3064189932, 27702518548, 225962416092, 2102864178560, 17375211533100, 165422663167944, 1377710367593992, 13372892400690664, 111984980465312848

Offset

1,1

Links

R. H. Hardin, Table of n, a(n) for n = 1..199

Example

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

Crossrefs

Column 4 of A234898.

Sequence in context: A109028 A193244 A240901 * A283028 A344241 A344242

Adjacent sequences: A234891 A234892 A234893 * A234895 A234896 A234897

Keyword

nonn

Author

R. H. Hardin, Jan 01 2014

Status

approved