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A205832 Number of (n+1)X5 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock equal to two 1
1611, 21126, 284910, 3875376, 52826862, 720376872, 9823579164, 133958429916, 1826692958490, 24909186485886, 339666855267840, 4631767319478810, 63159734164254090, 861259161426563160, 11744307584029537416 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A205836
LINKS
FORMULA
Empirical: a(n) = 25*a(n-1) -206*a(n-2) +807*a(n-3) -1625*a(n-4) +1558*a(n-5) -399*a(n-6) -1818*a(n-7) +2122*a(n-8) -1092*a(n-9) +276*a(n-10) for n>11
EXAMPLE
Some solutions for n=4
..2..2..1..0..2....1..2..1..0..0....1..0..1..2..2....1..0..2..2..1
..1..0..2..1..0....2..1..0..2..1....2..1..2..1..0....0..2..1..0..2
..2..1..0..2..1....0..2..1..0..2....0..2..0..2..1....1..0..2..1..0
..1..0..2..1..0....2..0..2..1..0....1..0..1..0..2....2..1..0..2..1
..2..1..0..2..1....0..1..0..2..1....2..1..2..1..0....0..2..1..0..2
CROSSREFS
Sequence in context: A023685 A301938 A352545 * A317397 A236060 A231048
KEYWORD
nonn
AUTHOR
R. H. Hardin Feb 01 2012
STATUS
approved

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Last modified June 19 02:16 EDT 2024. Contains 373492 sequences. (Running on oeis4.)