A234919 Number of (n+1) X (6+1) 0..4 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 2, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

12360, 47980, 186500, 990956, 4834440, 28854040, 150606424, 948274980, 5093099972, 33282246680, 182453908840, 1227449650312, 6855533668528, 47143909716212, 268032385984924, 1871592421095824, 10821681133242880

Offset

1,1

Links

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

Example

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

Crossrefs

Column 6 of A234921.

Sequence in context: A274247 A045080 A238051 * A183693 A096618 A238308

Adjacent sequences: A234916 A234917 A234918 * A234920 A234921 A234922

Keyword

nonn

Author

R. H. Hardin, Jan 01 2014

Status

approved