A206237 Number of (n+1) X 8 0..3 arrays with every 2 X 3 or 3 X 2 subblock having exactly two equal edges, and new values 0..3 introduced in row major order.
294546, 943584, 3503136, 95322432, 1122086640, 22535636736, 649065145152, 8026428934128, 163621204516992, 4735717646406528, 58825697658136176, 1199179807904946432, 34708074630513355776, 431133538136479945968
Offset: 1
Keywords
Examples
Some solutions for n=4: ..0..0..1..2..2..3..0..3....0..0..1..1..0..1..1..2....0..0..1..0..0..1..2..0 ..0..1..2..2..1..0..0..3....2..2..3..1..1..2..1..1....0..3..0..0..1..2..2..0 ..3..2..2..3..0..0..1..2....3..2..2..3..1..1..2..1....1..0..0..3..2..2..0..1 ..2..2..3..0..0..1..2..2....0..1..2..2..0..1..1..2....0..0..3..2..2..3..1..1 ..1..1..0..0..3..2..2..1....0..0..3..2..2..3..1..1....1..1..2..2..3..1..1..3
Links
- R. H. Hardin, Table of n, a(n) for n = 1..210
Formula
Empirical: a(n) = a(n-1) +7329*a(n-3) -7329*a(n-4) for n>11.
Comments