A204348 Number of (n+2)X7 0..3 arrays with no 3X3 subblock having three equal diagonal elements or three equal antidiagonal elements, and new values 0..3 introduced in row major order

96125591660, 919046909794048, 8653701637919899728, 81625476908305470240676, 769885056390910177755092784, 7261165826937524787547644589200, 68484240207050885222667504458844900

Offset

1,1

Comments

Column 5 of A204351

Links

R. H. Hardin, Table of n, a(n) for n = 1..8

Example

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

Crossrefs

Sequence in context: A104831 A231235 A162031 * A159474 A159757 A017183

Adjacent sequences: A204345 A204346 A204347 * A204349 A204350 A204351

Keyword

nonn

Author

R. H. Hardin Jan 14 2012

Status

approved