A208200 Number of nX7 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 left-upward diagonal neighbors

715, 10215440, 153402542384, 2303673397508915, 34594950233928279876, 519522527116810577984260, 7801822458198433796561428608, 117162260457319989881048135168019, 1759460094015764611132758812387283596

Offset

1,1

Comments

Column 7 of A208201

Links

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

Example

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

Crossrefs

Sequence in context: A208878 A208174 A200800 * A208407 A208414 A214237

Adjacent sequences: A208197 A208198 A208199 * A208201 A208202 A208203

Keyword

nonn

Author

R. H. Hardin Feb 24 2012

Status

approved