A233913 Number of (n+1)X(4+1) 0..7 arrays with every 2X2 subblock having the sum of the squares of the edge differences equal to 30, and no two adjacent values equal

9612, 138132, 1813476, 26954304, 369978404, 5494251884, 76393662524, 1131348498772, 15846113265432, 234199189701020, 3298277776530524, 48674865163210448, 688571019650205760, 10149555642796141884

Offset

1,1

Comments

Column 4 of A233917

Links

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

Example

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

Crossrefs

Sequence in context: A034626 A031596 A236715 * A031653 A253520 A254418

Adjacent sequences: A233910 A233911 A233912 * A233914 A233915 A233916

Keyword

nonn

Author

R. H. Hardin, Dec 17 2013

Status

approved