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A185516 Number of (n+1)X5 0..2 arrays with every 2X2 subblock singular 1
2553, 115979, 2490449, 80761059, 2183297449, 65652458491, 1894624012417, 56140705014995, 1649002255383641, 48754926946880491, 1438991178016735921, 42542454880958044611, 1257346657004360967433, 37177308864717054716635 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A185521

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

FORMULA

Empirical: a(n)=61*a(n-1)-1038*a(n-2)-2374*a(n-3)+235515*a(n-4)-2269967*a(n-5)+4091988*a(n-6)+57111048*a(n-7)-371380096*a(n-8)+662678992*a(n-9)+937755776*a(n-10)-4856175360*a(n-11)+5080858624*a(n-12)+506806272*a(n-13)-2361655296*a(n-14)

EXAMPLE

Some solutions for 3X5

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

..0..0..0..0..0....1..0..0..0..0....0..0..0..0..0....0..0..0..0..0

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

CROSSREFS

Sequence in context: A072435 A050413 A050544 * A235085 A252685 A255030

Adjacent sequences:  A185513 A185514 A185515 * A185517 A185518 A185519

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 29 2011

STATUS

approved

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Last modified December 7 03:41 EST 2016. Contains 278840 sequences.