A204881 Number of (n+2)X4 0..3 arrays with every 3X3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly one way, and new values 0..3 introduced in row major order

91703, 6082654, 432151810, 22654826769, 1421934861518, 94025074210903, 5608526903917271, 349189566512619779, 22216601313189734847, 1371048958056234125616, 85402144089827971048975

Offset

1,1

Comments

Column 2 of A204884

Links

R. H. Hardin, Table of n, a(n) for n = 1..107

Example

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

Crossrefs

Sequence in context: A253845 A253932 A205940 * A330159 A202590 A116097

Adjacent sequences: A204878 A204879 A204880 * A204882 A204883 A204884

Keyword

nonn

Author

R. H. Hardin Jan 20 2012

Status

approved