A198601 Number of 2nX10 0..3 arrays with values 0..3 introduced in row major order and each element equal to exactly two horizontal and vertical neighbors

14, 1985, 309770, 49726877, 8055413256, 1308245895665, 212660032469362, 34578446232234461, 5622954055105266638, 914399588312051428232, 148700162991801408836106, 24181772212240990503470021

Offset

1,1

Comments

Column 5 of A198604

Links

R. H. Hardin, Table of n, a(n) for n = 1..16

Example

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

Crossrefs

Sequence in context: A060614 A160305 A279804 * A233076 A134814 A258487

Adjacent sequences: A198598 A198599 A198600 * A198602 A198603 A198604

Keyword

nonn

Author

R. H. Hardin Oct 27 2011

Status

approved