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A233880 Number of (n+1)X(5+1) 0..2 arrays with every 2X2 subblock having the sum of the squares of all six edge and diagonal differences equal to 11 1
2400, 22020, 178704, 1768660, 15013864, 160334028, 1417225464, 16134545712, 147047775280, 1750029730452, 16265178436688, 198822715540700, 1868774647210040, 23183928173193336, 219227883708704288 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A233883

LINKS

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

FORMULA

Empirical: a(n) = 390*a(n-2) -63115*a(n-4) +5633508*a(n-6) -311287762*a(n-8) +11395143071*a(n-10) -290608508897*a(n-12) +5364876782159*a(n-14) -73770016903887*a(n-16) +771455610322102*a(n-18) -6226548780129951*a(n-20) +39172372910038001*a(n-22) -193237451888156699*a(n-24) +749448322438960607*a(n-26) -2284924382785662062*a(n-28) +5461859355511846682*a(n-30) -10185644885765121071*a(n-32) +14709447103939892100*a(n-34) -16281042118217455735*a(n-36) +13617119182197701100*a(n-38) -8438611741506693900*a(n-40) +3769223995920232000*a(n-42) -1166605374110880000*a(n-44) +236321446856400000*a(n-46) -28818965889000000*a(n-48) +1865383020000000*a(n-50) -48478500000000*a(n-52)

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A286342 A204357 A043420 * A234453 A236084 A204304

Adjacent sequences:  A233877 A233878 A233879 * A233881 A233882 A233883

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 17 2013

STATUS

approved

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Last modified January 22 19:25 EST 2022. Contains 350490 sequences. (Running on oeis4.)