A194785 Number of lower triangles of a (2n+5)X(2n+5) 0..n array with new values introduced in row major order 0..n and no element unequal to more than one horizontal or vertical neighbor

79, 1101, 10121, 80961, 631373, 5029741, 41587186, 358138793, 3210593393, 29914171526, 289187454251

Offset

1,1

Comments

Row 7 of A194778

Links

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

Example

Some solutions for n=2 containing a 2
..0..................0..................0..................0
..0.0................1.1................0.0................0.0
..0.0.0..............1.1.1..............1.1.1..............1.1.1
..1.1.1.1............1.1.1.1............1.1.1.2............1.1.1.1
..1.1.1.1.1..........1.1.1.1.0..........1.1.1.2.2..........2.2.2.2.2
..1.1.1.1.1.0........1.1.1.1.0.0........1.1.1.2.2.2........2.2.2.2.2.2
..1.1.1.1.1.0.0......1.1.1.1.0.0.2......1.1.1.2.2.2.2......1.1.1.1.1.1.1
..1.1.1.1.1.0.0.0....1.1.1.1.0.0.2.2....1.1.1.2.2.2.2.1....1.1.1.1.1.1.1.1
..1.1.1.1.1.0.0.0.2..1.1.1.1.0.0.2.2.0..1.1.1.2.2.2.2.1.1..2.2.2.2.2.2.2.2.2

Crossrefs

Sequence in context: A348894 A142816 A093279 * A231802 A098104 A061997

Adjacent sequences: A194782 A194783 A194784 * A194786 A194787 A194788

Keyword

nonn

Author

R. H. Hardin Sep 02 2011

Status

approved