A236113 Number of (n+1)X(1+1) 0..3 arrays colored with the difference of the maximum and the upper median in each 2X2 subblock

256, 2248, 20000, 175096, 1538144, 13525664, 118990080, 1045666976, 9189157840, 80777516672, 710143327296, 6242142152960, 54866901910784, 482290009045120, 4239509147919360, 37265899068310016, 327571084007019264

Offset

1,1

Comments

Column 1 of A236118

Links

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

Formula

Empirical: a(n) = 136*a(n-3) +2752*a(n-4) +8440*a(n-5) +61552*a(n-6) +157376*a(n-7) +161456*a(n-8) +545568*a(n-9) -1267328*a(n-10) -1455616*a(n-11) -2677184*a(n-12) -2909056*a(n-13) +2609152*a(n-14) +12288*a(n-15) -208896*a(n-16) +1271808*a(n-17) -405504*a(n-18) for n>19

Example

Some solutions for n=4
..0..1....2..0....0..1....2..3....0..2....2..2....0..2....2..3....0..2....0..0
..1..3....0..3....3..0....0..1....1..1....0..1....1..1....1..1....0..1....0..3
..0..2....3..0....1..2....0..1....0..0....2..1....1..0....0..0....1..3....1..3
..1..2....1..1....2..2....0..0....0..3....0..2....0..2....3..0....3..2....1..1
..3..1....2..3....2..3....0..2....0..2....3..2....2..1....2..1....2..2....3..3

Crossrefs

Sequence in context: A236500 A236495 A236118 * A235521 A235652 A235518

Adjacent sequences: A236110 A236111 A236112 * A236114 A236115 A236116

Keyword

nonn

Author

R. H. Hardin, Jan 19 2014

Status

approved