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A121345 Number of osculating polygons of perimeter 2n on square lattice. 1
0, 1, 2, 9, 36, 170, 832, 4318, 23164, 128141, 725806, 4194923, 24657628, 147053105, 888044678, 5421873743, 33423442196, 207811667858, 1301996110320, 8213617403274, 52138266933540, 332834181990220 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

I. Jensen, Table of n, a(n) for n = 1..44 (from link below)

I. Jensen, More terms

CROSSREFS

Sequence in context: A150976 A150977 A150978 * A150979 A150980 A137955

Adjacent sequences:  A121342 A121343 A121344 * A121346 A121347 A121348

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Aug 29 2006

STATUS

approved

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Last modified July 27 08:33 EDT 2021. Contains 346304 sequences. (Running on oeis4.)