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A233879 Number of (n+1)X(4+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
760, 5156, 33656, 251532, 1768660, 14111768, 103547288, 858513368, 6440961128, 54554580804, 413974622656, 3548715192184, 27091433272416, 233867231401352, 1791402389131776, 15529726061076424, 119191486778549872 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A233883

LINKS

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

FORMULA

Empirical: a(n) = 10*a(n-1) +111*a(n-2) -1347*a(n-3) -2952*a(n-4) +61962*a(n-5) -23589*a(n-6) -1303743*a(n-7) +2061738*a(n-8) +13676265*a(n-9) -32627870*a(n-10) -74205472*a(n-11) +248050297*a(n-12) +184715702*a(n-13) -1058894761*a(n-14) +18879451*a(n-15) +2642739884*a(n-16) -1291495298*a(n-17) -3771977707*a(n-18) +3244720225*a(n-19) +2774675096*a(n-20) -3693043205*a(n-21) -677649206*a(n-22) +2114258648*a(n-23) -285661000*a(n-24) -570117698*a(n-25) +190279800*a(n-26) +48545460*a(n-27) -28512000*a(n-28) +2851200*a(n-29)

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A258135 A247400 A234892 * A165629 A151633 A022051

Adjacent sequences:  A233876 A233877 A233878 * A233880 A233881 A233882

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 17 2013

STATUS

approved

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Last modified September 27 04:10 EDT 2021. Contains 347673 sequences. (Running on oeis4.)