A121345 Number of osculating polygons of perimeter 2n on square lattice.

0, 1, 2, 9, 36, 170, 832, 4318, 23164, 128141, 725806, 4194923, 24657628, 147053105, 888044678, 5421873743, 33423442196, 207811667858, 1301996110320, 8213617403274, 52138266933540, 332834181990220

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