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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 1
9612, 138132, 1813476, 26954304, 369978404, 5494251884, 76393662524, 1131348498772, 15846113265432, 234199189701020, 3298277776530524, 48674865163210448, 688571019650205760, 10149555642796141884 (list; graph; refs; listen; history; text; internal format)
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

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Last modified September 16 23:53 EDT 2021. Contains 347477 sequences. (Running on oeis4.)