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A205469 Number of (n+1)X3 0..2 arrays with every 2X2 subblock having the same number of equal edges, and new values 0..2 introduced in row major order 1
48, 263, 1548, 9654, 61978, 405702, 2686876, 17926060, 120146998, 807610262, 5438698312, 36669657896, 247432193154, 1670424338586, 11280890946852, 76200323465372, 514795456961870, 3478208969481038, 23502035785763264 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 2 of A205475
LINKS
FORMULA
Empirical: a(n) = 16*a(n-1) -85*a(n-2) +142*a(n-3) +159*a(n-4) -676*a(n-5) +465*a(n-6) +298*a(n-7) -506*a(n-8) +220*a(n-9) -32*a(n-10)
EXAMPLE
Some solutions for n=4
..0..0..1....0..1..0....0..1..2....0..0..0....0..0..0....0..1..0....0..1..0
..1..2..1....1..2..1....1..2..0....0..1..0....0..1..0....0..1..0....0..1..0
..1..0..0....2..1..2....2..1..2....1..1..1....1..1..0....0..0..0....0..0..0
..1..2..1....0..2..0....0..2..1....2..1..0....2..1..0....1..0..1....2..0..2
..1..0..0....1..0..1....1..0..2....2..1..1....2..1..1....1..1..1....2..0..2
CROSSREFS
Sequence in context: A235911 A235904 A275406 * A115056 A001337 A259993
KEYWORD
nonn
AUTHOR
R. H. Hardin Jan 27 2012
STATUS
approved

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Last modified April 19 15:34 EDT 2024. Contains 371794 sequences. (Running on oeis4.)