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A005331 Certain subgraphs of a directed graph (binomial transform of A005321).
(Formerly M1531)
1
1, 2, 5, 20, 179, 4082, 218225, 25316720, 6135834479, 3047003143022, 3067545380897645, 6223557209578656620, 25360384878802358268779, 207167485813280961035481962, 3389045635023473628621934703465 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

REFERENCES

N. J. A. Sloane and Simon Plouffe, The Encyclopedia of Integer Sequences, Academic Press, 1995 (includes this sequence).

LINKS

Table of n, a(n) for n=0..14.

E. Andresen, K. Kjeldsen, On certain subgraphs of a complete transitively directed graph, Discrete Math. 14 (1976), no. 2, 103-119.

N. J. A. Sloane, Transforms

FORMULA

a(n) = Sum_{j=0..n} binomial(n,j)*A005321(j).

CROSSREFS

Sequence in context: A181076 A156871 A058109 * A261005 A158872 A308522

Adjacent sequences:  A005328 A005329 A005330 * A005332 A005333 A005334

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from Max Alekseyev, May 04 2010

STATUS

approved

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Last modified November 17 00:08 EST 2019. Contains 329209 sequences. (Running on oeis4.)