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A233934 Number of (n+1)X(1+1) 0..7 arrays with every 2X2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 16 1
312, 1996, 12880, 88572, 609912, 4361260, 30999664, 226112364, 1632434488, 12023904092, 87476145488, 647317646108, 4727495091576, 35056982203980, 256540627260976, 1904048129719436, 13948922790405176, 103557690225690108 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A233939

LINKS

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

FORMULA

Empirical: a(n) = 10*a(n-1) +56*a(n-2) -828*a(n-3) +457*a(n-4) +18458*a(n-5) -42836*a(n-6) -129360*a(n-7) +480656*a(n-8) +107168*a(n-9) -1616128*a(n-10) +780160*a(n-11) +1960960*a(n-12) -1441792*a(n-13) -809984*a(n-14) +628736*a(n-15) +122880*a(n-16) -65536*a(n-17)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A237551 A270608 A233939 * A289793 A022044 A156403

Adjacent sequences:  A233931 A233932 A233933 * A233935 A233936 A233937

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 18 2013

STATUS

approved

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Last modified September 20 02:20 EDT 2019. Contains 327207 sequences. (Running on oeis4.)