A208405 Number of nX5 0..3 arrays with new values 0..3 introduced in row major order and no element equal to more than two of its immediate leftward or upward or right-upward antidiagonal neighbors

51, 41914, 40883360, 40039156736, 39216100214432, 38410047476679936, 37620564383817645696, 36847308431734650845696, 36089946042522268966513152, 35348150537672718536490582016, 34621601954234065647421901637632

Offset

1,1

Comments

Column 5 of A208408

Links

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

Formula

Empirical: a(n) = 1008*a(n-1) -28108*a(n-2) +138160*a(n-3) -223680*a(n-4) +168192*a(n-5) -55296*a(n-6) for n>7

Example

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

Crossrefs

Sequence in context: A241117 A255832 A208198 * A208412 A198904 A238567

Adjacent sequences: A208402 A208403 A208404 * A208406 A208407 A208408

Keyword

nonn

Author

R. H. Hardin Feb 26 2012

Status

approved