A235021 Number of (n+1) X (3+1) 0..5 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).

1248, 4312, 14800, 51220, 177520, 617600, 2152744, 7527124, 26367488, 92632604, 326009192, 1150507192, 4067126368, 14415310196, 51176035576, 182134771204, 649220616600, 2319643303000, 8300224862256, 29766948184132, 106901780220416

Offset

1,1

Links

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

R. H. Hardin, Empirical recurrence of order 63

Formula

Empirical recurrence of order 63 (see link above).

Example

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

Crossrefs

Column 3 of A235026.

Sequence in context: A114528 A069146 A251648 * A184500 A234212 A047629

Adjacent sequences: A235018 A235019 A235020 * A235022 A235023 A235024

Keyword

nonn

Author

R. H. Hardin, Jan 02 2014

Status

approved