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A057408 Number of self-avoiding polygons of area n with 3 (self-avoiding polygon) holes on square lattice (not allowing rotations). 1
10, 212, 2530, 22640, 169906, 1131904, 6920388, 39668532, 216315230, 1133876128, 5757104542, 28478125312, 137854314576, 655307492388, 3067528095994, 14171567365156, 64732059542906, 292778085749036 (list; graph; refs; listen; history; text; internal format)
OFFSET

18,1

LINKS

I. Jensen, Table of n, a(n) for n = 18..47 (from link below)

I. Jensen, More terms

CROSSREFS

Sequence in context: A327411 A112364 A201621 * A280903 A239770 A239771

Adjacent sequences:  A057405 A057406 A057407 * A057409 A057410 A057411

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Aug 30 2000

STATUS

approved

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Last modified September 18 05:32 EDT 2019. Contains 327165 sequences. (Running on oeis4.)