A235102 Number of (n+1) X (3+1) 0..6 arrays with every 2 X 2 subblock having its diagonal sum differing from its antidiagonal sum by 4, with no adjacent elements equal (constant-stress tilted 1 X 1 tilings).

2900, 9328, 30312, 101464, 345280, 1201872, 4256548, 15381300, 56526280, 211590104, 804635776, 3110475000, 12194766820, 48482860692, 195060662440, 793719896600, 3260655523872, 13512949591560, 56412040046244

Offset

1,1

Links

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

R. H. Hardin, Empirical recurrence of order 62

Formula

Empirical recurrence of order 62 (see link above).

Example

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

Crossrefs

Column 3 of A235107.

Sequence in context: A248109 A219963 A340201 * A252267 A207281 A207477

Adjacent sequences: A235099 A235100 A235101 * A235103 A235104 A235105

Keyword

nonn

Author

R. H. Hardin, Jan 03 2014

Status

approved