A208407 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 right-upward antidiagonal neighbors

715, 10370330, 157873031498, 2403711876698218, 36598079445605633928, 557229580446475130201608, 8484183047877022205116428184, 129177209027669581083328287797640, 1966807085374417176424317546443585928

Offset

1,1

Comments

Column 7 of A208408

Links

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

Example

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

Crossrefs

Sequence in context: A208174 A200800 A208200 * A208414 A214237 A252467

Adjacent sequences: A208404 A208405 A208406 * A208408 A208409 A208410

Keyword

nonn

Author

R. H. Hardin Feb 26 2012

Status

approved