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A234629 Numbers of undirected cycles in the n-triangular graph. 1
0, 1, 63, 15703, 58520309, 4160751709140, 6537540397103648498 (list; graph; refs; listen; history; text; internal format)
OFFSET

2,3

LINKS

Table of n, a(n) for n=2..8.

Eric Weisstein's World of Mathematics, Graph Cycle

Eric Weisstein's World of Mathematics, Triangular Graph

CROSSREFS

Sequence in context: A160871 A183525 A279043 * A270507 A289875 A062208

Adjacent sequences:  A234626 A234627 A234628 * A234630 A234631 A234632

KEYWORD

nonn,more

AUTHOR

Eric W. Weisstein, Dec 28 2013

EXTENSIONS

a(7)-a(8) from Eric W. Weisstein, Apr 09 2014

STATUS

approved

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Last modified June 25 21:43 EDT 2019. Contains 324357 sequences. (Running on oeis4.)