

A002087


Number of pointsymmetric tournaments with 2n+1 nodes.
(Formerly M0578 N0211)


3




OFFSET

1,3


REFERENCES

N. J. A. Sloane, A Handbook of Integer Sequences, Academic Press, 1973 (includes this sequence).
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=1..9.
B. Alspach, On pointsymmetric tournaments, Canad. Math. Bull., 13 (1970), 317323. See t(n).
B. Alspach, On pointsymmetric tournaments, Canad. Math. Bull., 13 (1970), 317323. [Annotated copy] See t(n).
Index entries for sequences related to tournaments


CROSSREFS

Cf. A002086, A049288 (note that A002086, A002087, A049288 are distinct sequences).
Sequence in context: A056712 A204540 A280592 * A049288 A102946 A026094
Adjacent sequences: A002084 A002085 A002086 * A002088 A002089 A002090


KEYWORD

nonn,more


AUTHOR

N. J. A. Sloane.


EXTENSIONS

Reference to Alspach (1970) corrected by Andrew Howroyd, Apr 28 2017


STATUS

approved



