A198666 Number of nX5 0..4 arrays with values 0..4 introduced in row major order and each element equal to one or two horizontal and vertical neighbors

3, 401, 59281, 16089057, 4202762288, 1169280626549, 319298496941179, 88036039866608856, 24178531581358186023, 6652092118081667287328, 1828775268871126181679152

Offset

1,1

Comments

Column 5 of A198669

Links

Table of n, a(n) for n=1..11.

Example

Some solutions with all values 0 to 4 for n=3
..0..0..1..2..3....0..0..1..1..2....0..1..2..2..2....0..0..0..1..2
..4..4..1..2..3....0..3..3..3..2....0..1..3..3..3....1..1..1..1..2
..0..0..0..1..1....0..4..4..0..0....4..4..4..4..3....1..3..3..4..4

Crossrefs

Sequence in context: A137023 A203563 A181990 * A377032 A330014 A305664

Adjacent sequences: A198663 A198664 A198665 * A198667 A198668 A198669

Keyword

nonn

Author

R. H. Hardin Oct 28 2011

Status

approved