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

657, 29650, 1318221, 57786977, 2488428258, 105669469816, 4440075543303, 185097842285157, 7670637569725292, 316449276490619988, 13010107213014172819, 533466565156551030287, 21829520926687529872322

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