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A094156 Bisection of A000940. 1
1, 4, 39, 1219, 83435, 9223092, 1453132944, 307690667072, 84241805734539, 28963120073957838, 12217399235411398127, 6204484017822892034404, 3734180195629471796396217, 2628347798377200707293720724, 2139135966227357959535426526975, 1993415431315860419823374898234950 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

LINKS

Table of n, a(n) for n=1..16.

S. W. Golomb and L. R. Welch, On the enumeration of polygons, Amer. Math. Monthly, 67 (1960), 349-353.

CROSSREFS

Sequence in context: A341473 A086217 A203197 * A266859 A049475 A264084

Adjacent sequences:  A094153 A094154 A094155 * A094157 A094158 A094159

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, May 05 2004

STATUS

approved

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Last modified March 2 05:59 EST 2021. Contains 341742 sequences. (Running on oeis4.)