A235003 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 2, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

1946, 14182, 114796, 1049470, 10000516, 98790336, 988422984, 9992949442, 101510004806, 1035354643932, 10588460621818, 108550039660252, 1115075627451580, 11476028691627948, 118307818963681254

Offset

1,1

Links

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

R. H. Hardin, Empirical recurrence of order 70

Formula

Empirical recurrence of order 70 (see link above).

Example

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

Crossrefs

Column 2 of A235007.

Sequence in context: A269039 A300199 A252151 * A223464 A252062 A251843

Adjacent sequences: A235000 A235001 A235002 * A235004 A235005 A235006

Keyword

nonn

Author

R. H. Hardin, Jan 02 2014

Status

approved