A233786 - OEIS

A233786

Number of (n+1)X(2+1) 0..3 arrays with every 2X2 subblock having the sum of the squares of all six edge and diagonal differences equal to 11

188, 864, 3932, 19396, 93100, 479628, 2368972, 12497004, 62641260, 334456748, 1688689644, 9069659180, 45953746604, 247510078252, 1256167155500, 6774945913516, 34411551292588, 185712460447404, 943631404857772

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OFFSET

1,1

COMMENTS

Column 2 of A233792

LINKS

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

FORMULA

Empirical: a(n) = 5*a(n-1) +34*a(n-2) -196*a(n-3) -148*a(n-4) +1770*a(n-5) -1056*a(n-6) -4344*a(n-7) +5088*a(n-8) +864*a(n-9) -2880*a(n-10) +864*a(n-11)

EXAMPLE

Some solutions for n=5

..0..1..3....0..1..2....2..0..2....3..3..1....0..2..3....3..2..1....2..1..0

..2..2..1....2..0..2....2..1..2....2..1..2....2..1..1....1..3..1....0..2..2

..1..0..2....1..2..1....2..0..2....3..3..3....1..3..2....2..1..2....0..1..0

..2..0..1....1..3..1....2..1..2....1..2..1....2..3..1....0..2..0....2..0..2

..1..2..2....1..2..1....2..0..2....1..3..3....3..1..2....1..2..1....2..1..2

..0..0..1....2..0..0....1..0..1....3..2..1....2..3..3....3..3..1....0..0..0

CROSSREFS

Sequence in context: A099945 A211814 A335592 * A233961 A073586 A064115

Adjacent sequences: A233783 A233784 A233785 * A233787 A233788 A233789

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 15 2013

STATUS

approved