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A057406 Number of self-avoiding polygons of area n with one (self-avoiding polygon) hole on square lattice (not allowing rotations). 3
1, 12, 88, 524, 2786, 13788, 64998, 296032, 1314648, 5728172, 24595512, 104399172, 439084884, 1833027048, 7605691356, 31398503248, 129072844079, 528688519536, 2158900271080, 8792641674684, 35728408159781 (list; graph; refs; listen; history; text; internal format)
OFFSET

8,2

LINKS

I. Jensen, Table of n, a(n) for n = 8..41 (from link below)

I. Jensen, More terms

CROSSREFS

Sequence in context: A228500 A082814 A178257 * A125349 A164608 A081009

Adjacent sequences:  A057403 A057404 A057405 * A057407 A057408 A057409

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Aug 30 2000

STATUS

approved

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Last modified September 15 02:19 EDT 2019. Contains 327062 sequences. (Running on oeis4.)