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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 1
188, 864, 3932, 19396, 93100, 479628, 2368972, 12497004, 62641260, 334456748, 1688689644, 9069659180, 45953746604, 247510078252, 1256167155500, 6774945913516, 34411551292588, 185712460447404, 943631404857772 (list; graph; refs; listen; history; text; internal format)
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

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Last modified September 16 08:18 EDT 2021. Contains 347469 sequences. (Running on oeis4.)