A235965 Number of (n+1)X(1+1) 0..3 arrays colored with the upper median value of each 2X2 subblock

256, 1964, 13194, 85476, 556486, 3614066, 23457361, 152354048, 990262160, 6430004688, 41756569624, 271256431352, 1762097787460, 11443841761376, 74329271829200, 482816708790400, 3136044047363744, 20368663950465184

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