A235244 Number of (n+1) X (4+1) 0..7 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 6, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

16150, 41246, 108374, 338282, 1039502, 3521538, 11626526, 41097666, 141434374, 515121002, 1826965054, 6821774074, 24807303134, 94706874378, 352039395094, 1371301958834, 5197451865566, 20616621173346, 79485584533838

Offset

1,1

Comments

Column 4 of A235248.

Links

R. H. Hardin, Table of n, a(n) for n = 1..193

R. H. Hardin, Empirical recurrence of order 61

Formula

Empirical recurrence of order 61 (see link above).

Example

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

Crossrefs

Sequence in context: A184405 A134120 A109566 * A236872 A031843 A031624

Adjacent sequences: A235241 A235242 A235243 * A235245 A235246 A235247

Keyword

nonn

Author

R. H. Hardin, Jan 05 2014

Status

approved