A235073 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, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

1828, 12228, 86704, 644188, 4832976, 36598068, 278216484, 2124989472, 16281513720, 125246817248, 966215387976, 7481473215920, 58076742720512, 452383706822008, 3531578851849512, 27656665567114376, 216990167306048568

Offset

1,1

Links

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

R. H. Hardin, Empirical recurrence of order 73

Formula

Empirical recurrence of order 73 (see link above).

Example

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

Crossrefs

Column 2 of A235078.

Sequence in context: A264215 A167266 A177786 * A205921 A196895 A151644

Adjacent sequences: A235070 A235071 A235072 * A235074 A235075 A235076

Keyword

nonn

Author

R. H. Hardin, Jan 03 2014

Status

approved