A002087 Number of point-symmetric tournaments with 2n+1 nodes. (Formerly M0578 N0211)

1, 1, 2, 3, 4, 6, 16, 16, 30

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 point-symmetric tournaments, Canad. Math. Bull., 13 (1970), 317-323. See t(n).

B. Alspach, On point-symmetric tournaments, Canad. Math. Bull., 13 (1970), 317-323. [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: A280592 A330990 A337129 * A049288 A346179 A102946

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