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A233855 Number of (n+1)X(3+1) 0..7 arrays with every 2X2 subblock having the sum of the squares of all six edge and diagonal differences equal to 59 1
4640, 22472, 106304, 716800, 4319616, 34000600, 226756256, 1873475872, 13046763360, 108927798728, 775259184232, 6465552671224, 46607527471896, 387135535384352, 2814016270828984, 23274895181188384, 170164969520406888 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A233859

LINKS

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

EXAMPLE

Some solutions for n=3

..6..6..7..2....2..4..2..7....2..6..2..5....5..0..5..0....2..4..2..4

..7..2..6..6....6..1..6..4....1..4..7..3....1..3..1..3....0..5..0..5

..4..6..7..2....4..2..2..1....2..6..2..5....5..6..5..6....1..1..3..1

..7..2..6..6....6..1..6..4....7..6..7..3....3..1..3..1....5..0..5..6

CROSSREFS

Sequence in context: A139410 A031566 A236815 * A068268 A227482 A028551

Adjacent sequences:  A233852 A233853 A233854 * A233856 A233857 A233858

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 16 2013

STATUS

approved

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Last modified October 17 08:36 EDT 2019. Contains 328107 sequences. (Running on oeis4.)