A233853 - OEIS

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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

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