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A234827 Number of (n+1)X(3+1) 0..2 arrays with each 2X2 subblock having the number of clockwise edge increases less than or equal to the number of counterclockwise edge increases 1
3843, 161631, 6566460, 263929692, 10572386472, 423046102605, 16922003634471, 676811269740528, 27068730475090632, 1082588035969280076, 43296916055230905366, 1731610426247501412189, 69253743854202407932599 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 3 of A234832

LINKS

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

FORMULA

Empirical: a(n) = 69*a(n-1) -1465*a(n-2) +13735*a(n-3) -65766*a(n-4) +174137*a(n-5) -265580*a(n-6) +234847*a(n-7) -111244*a(n-8) +19238*a(n-9) +45*a(n-10) -6*a(n-11) +72*a(n-12) -9*a(n-13)

EXAMPLE

Some solutions for n=2

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

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

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

CROSSREFS

Sequence in context: A179747 A237371 A061404 * A253291 A253161 A185773

Adjacent sequences:  A234824 A234825 A234826 * A234828 A234829 A234830

KEYWORD

nonn

AUTHOR

R. H. Hardin, Dec 31 2013

STATUS

approved

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Last modified October 2 23:51 EDT 2022. Contains 357230 sequences. (Running on oeis4.)