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A234146 Number of (n+1) X (1+1) 0..5 arrays with every 2 X 2 subblock having the sum of the absolute values of the edge differences equal to 10 and no adjacent elements equal. 1
184, 1264, 8752, 62004, 439572, 3129240, 22275612, 158687156, 1130414100, 8053620640, 57377216736, 408788140012, 2912431493704, 20749855456308, 147833924812756, 1053254915776492, 7503999725717600, 53462860382183344 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

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

FORMULA

Empirical: a(n) = 6*a(n-1) + 25*a(n-2) - 105*a(n-3) - 192*a(n-4) + 494*a(n-5) + 478*a(n-6) - 322*a(n-7) - 204*a(n-8).

Empirical g.f.: 4*x*(46 + 40*x - 858*x^2 - 697*x^3 + 4199*x^4 + 3115*x^5 - 2673*x^6 - 1530*x^7) / ((1 - 6*x - 25*x^2 + 105*x^3 + 192*x^4 - 494*x^5 - 478*x^6 + 322*x^7 + 204*x^8)). - Colin Barker, Oct 13 2018

EXAMPLE

Some solutions for n=4:

  4 5   3 0   4 2   2 5   2 0   3 0   2 3   0 2   3 1   3 2

  5 1   4 5   0 3   0 1   5 2   5 1   5 1   5 4   2 5   0 4

  3 0   0 1   2 0   4 5   1 0   3 4   4 0   0 3   0 2   4 3

  5 1   5 3   5 2   0 2   5 4   5 1   5 3   3 1   5 4   0 4

  2 0   4 0   3 5   4 5   1 0   2 0   4 0   1 4   4 0   3 2

CROSSREFS

Column 1 of A234152.

Sequence in context: A235251 A233676 A234152 * A164997 A121733 A235250

Adjacent sequences:  A234143 A234144 A234145 * A234147 A234148 A234149

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 20 2013

STATUS

approved

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Last modified October 28 10:56 EDT 2021. Contains 348327 sequences. (Running on oeis4.)