A234187 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 2 (constant-stress 1 X 1 tilings).

33720, 549448, 9120608, 153306026, 2571461348, 43400523142, 730012705548, 12351551016378, 208225886140004, 3531762344820950, 59673341526538620, 1014709076188331830, 17184235472239702180, 292979555763785920878

Offset

1,1

Comments

Column 3 of A234190.

Links

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

Example

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

Crossrefs

Sequence in context: A235504 A355142 A297127 * A209827 A235735 A235516

Adjacent sequences: A234184 A234185 A234186 * A234188 A234189 A234190

Keyword

nonn

Author

R. H. Hardin, Dec 20 2013

Status

approved