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A194936 Number of lower triangles of a 7X7 0..n array with no element differing from any of its horizontal or vertical neighbors by more than one 1
268435456, 11761200209, 46128809462, 91397735301, 139323386328, 187700534197, 236134568314, 284573981453, 333013734808, 381453501205, 429893267858, 478333034513, 526772801168, 575212567823, 623652334478, 672092101133 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Row 7 of A194931

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

FORMULA

Empirical: a(n) = 48439766655*n - 102944165347 for n>10

EXAMPLE

Some solutions for n=2

..1..............2..............2..............1..............0

..1.1............2.1............2.2............0.0............1.2

..2.2.1..........2.2.2..........1.2.2..........1.1.0..........2.1.1

..1.1.2.2........2.2.2.2........2.1.2.1........2.1.0.1........2.1.2.2

..2.1.1.2.1......1.1.1.2.1......2.1.1.0.0......1.1.1.1.2......1.1.2.1.0

..2.1.2.2.2.1....0.1.0.1.2.2....1.1.2.1.1.2....0.1.0.0.1.0....0.0.1.0.1.0

..1.2.2.2.1.0.1..0.0.1.1.1.2.2..0.1.2.2.2.1.1..0.0.0.1.2.1.0..0.0.1.1.0.0.1

CROSSREFS

Sequence in context: A223605 A223698 A195237 * A195253 A122969 A137492

Adjacent sequences:  A194933 A194934 A194935 * A194937 A194938 A194939

KEYWORD

nonn

AUTHOR

R. H. Hardin Sep 05 2011

STATUS

approved

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Last modified May 31 22:35 EDT 2020. Contains 334756 sequences. (Running on oeis4.)