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A078102 One-half of number of ways of 3-coloring an (n-2) X n grid. 1
2, 27, 853, 63267, 11045757, 4547477370, 4419979346851, 10150938472416408, 55117503183129188479, 707887801249881516079368, 21511908182992495395699279579, 1547207013442473554135873920560606 (list; graph; refs; listen; history; text; internal format)
OFFSET

3,1

REFERENCES

Michael S. Paterson (Warwick), personal communication.

LINKS

Table of n, a(n) for n=3..14.

FORMULA

See A078099 for formula.

CROSSREFS

A diagonal of A078099.

Sequence in context: A138458 A090248 A182934 * A221534 A221535 A067075

Adjacent sequences:  A078099 A078100 A078101 * A078103 A078104 A078105

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Dec 05 2002

EXTENSIONS

a(7) - a(14) from Alois P. Heinz, Mar 24 2009

STATUS

approved

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Last modified May 23 17:52 EDT 2013. Contains 225611 sequences.