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A210091 Number of (n+1)X5 0..2 arrays containing all values 0..2 with every 2X2 subblock having one or two distinct values, and new values 0..2 introduced in row major order 1
657, 29650, 1318221, 57786977, 2488428258, 105669469816, 4440075543303, 185097842285157, 7670637569725292, 316449276490619988, 13010107213014172819, 533466565156551030287, 21829520926687529872322 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A210095

LINKS

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

FORMULA

Empirical: a(n) = 92*a(n-1) -2759*a(n-2) +28247*a(n-3) -12894*a(n-4) -1142474*a(n-5) +3601421*a(n-6) +11970542*a(n-7) -56246539*a(n-8) -20466947*a(n-9) +259395248*a(n-10) -85275847*a(n-11) -451433420*a(n-12) +270874469*a(n-13) +310376692*a(n-14) -241516822*a(n-15) -72716144*a(n-16) +82685288*a(n-17) -2658056*a(n-18) -9212400*a(n-19) +1726736*a(n-20) +40928*a(n-21) -15360*a(n-22)

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A309963 A289290 A034818 * A068260 A252365 A198207

Adjacent sequences:  A210088 A210089 A210090 * A210092 A210093 A210094

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 17 2012

STATUS

approved

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Last modified January 18 14:40 EST 2022. Contains 350455 sequences. (Running on oeis4.)