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A235965 Number of (n+1)X(1+1) 0..3 arrays colored with the upper median value of each 2X2 subblock 1
256, 1964, 13194, 85476, 556486, 3614066, 23457361, 152354048, 990262160, 6430004688, 41756569624, 271256431352, 1762097787460, 11443841761376, 74329271829200, 482816708790400, 3136044047363744, 20368663950465184 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 1 of A235972

LINKS

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

FORMULA

Empirical: a(n) = 96*a(n-3) +752*a(n-4) +1456*a(n-5) +6180*a(n-6) +6848*a(n-7) +13712*a(n-8) +9408*a(n-9) +12288*a(n-10) for n>13

EXAMPLE

Some solutions for n=4

..0..3....2..1....1..1....0..2....0..0....0..1....0..1....0..0....0..0....2..1

..0..2....3..0....2..3....1..3....1..2....1..2....0..0....3..0....1..2....0..0

..0..0....2..3....3..1....2..3....3..1....2..3....2..3....3..2....2..3....2..0

..2..1....0..1....2..0....1..1....0..1....3..2....3..2....1..1....0..3....1..1

..2..2....0..3....1..0....3..1....3..2....1..0....2..2....3..1....0..2....3..2

CROSSREFS

Sequence in context: A238063 A238058 A235972 * A206188 A205370 A205659

Adjacent sequences:  A235962 A235963 A235964 * A235966 A235967 A235968

KEYWORD

nonn

AUTHOR

R. H. Hardin, Jan 17 2014

STATUS

approved

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Last modified June 22 00:38 EDT 2021. Contains 345367 sequences. (Running on oeis4.)