A235254 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 7, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

10820, 30300, 80812, 247368, 717452, 2337832, 7200188, 24526880, 79038828, 278130808, 928595228, 3348693040, 11501925612, 42273509096, 148589755644, 554433956880, 1986244387756, 7503170736632, 27309763183164, 104229909761984

Offset

1,1

Comments

Column 4 of A235258.

Links

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

R. H. Hardin, Empirical recurrence of order 58

Formula

Empirical recurrence of order 58 (see link above).

Example

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

Crossrefs

Sequence in context: A203394 A144716 A123078 * A237190 A065321 A252064

Adjacent sequences: A235251 A235252 A235253 * A235255 A235256 A235257

Keyword

nonn

Author

R. H. Hardin, Jan 05 2014

Status

approved