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A233853 Number of (n+1)X(1+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
216, 1040, 4640, 22592, 104576, 511232, 2416128, 11843584, 56662016, 278233088, 1340661760, 6590103552, 31886114816, 156834529280, 760657608704, 3742678646784, 18177218576384, 89455627075584, 434806175301632 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A233859

LINKS

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

FORMULA

Empirical: a(n) = 64*a(n-2) -1536*a(n-4) +17408*a(n-6) -95488*a(n-8) +235520*a(n-10) -237568*a(n-12) +65536*a(n-14)

EXAMPLE

Some solutions for n=5

..1..1....1..6....6..4....5..0....2..1....4..2....5..1....1..0....5..6....0..4

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

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

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

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

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

CROSSREFS

Sequence in context: A177493 A162142 A233859 * A245993 A233980 A233974

Adjacent sequences:  A233850 A233851 A233852 * A233854 A233855 A233856

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 16 2013

STATUS

approved

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Last modified September 23 09:03 EDT 2020. Contains 337298 sequences. (Running on oeis4.)