A215743 Number of horizontal, vertical, diagonal and antidiagonal neighbor colorings of the odd squares of an n X 6 array with new integer colors introduced in row major order.

1, 2, 15, 364, 29084, 4851360, 1396243937, 621070325112, 397357555166874, 347527814415145984, 399998919849572992699, 588252794234398220649896, 1079540725180986409339750810, 2424777953471684438806091877856, 6559018912065982947335186853751568

Offset

0,2

Links

Andrew Howroyd, Table of n, a(n) for n = 0..50

Example

Some solutions for n=3:
..x..0..x..1..x..2....x..0..x..1..x..2....x..0..x..1..x..2....x..0..x..1..x..0
..3..x..4..x..0..x....3..x..2..x..3..x....2..x..3..x..4..x....2..x..3..x..4..x
..x..2..x..5..x..4....x..4..x..0..x..1....x..1..x..2..x..1....x..5..x..2..x..1

Crossrefs

Column 6 of A215745 and column 6 of A215847.

Sequence in context: A175563 A231443 A068391 * A254224 A071102 A272899

Adjacent sequences: A215740 A215741 A215742 * A215744 A215745 A215746

Keyword

nonn

Author

R. H. Hardin, Aug 22 2012

Extensions

a(0)=1 prepended and terms a(9) and beyond from Andrew Howroyd, Jun 25 2017

Status

approved