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A241585 Number of orbits of Sym(n)^2 under action of Iso_1*(n). 2
1, 3, 8, 28, 93, 425, 2151, 14016 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,2

REFERENCES

Bogaerts, Mathieu; Dukes, Peter. Semidefinite programming for permutation codes. Discrete Math. 326 (2014), 34--43. MR3188985.

LINKS

Table of n, a(n) for n=1..8.

FORMULA

Proposition 3.3 of Bogaerts et al. gives an explicit formula.

CROSSREFS

Cf. A241584, A110143.

Sequence in context: A148855 A148856 A151482 * A273162 A148857 A148858

Adjacent sequences:  A241582 A241583 A241584 * A241586 A241587 A241588

KEYWORD

nonn,more

AUTHOR

N. J. A. Sloane, May 12 2014

STATUS

approved

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Last modified October 21 20:44 EDT 2019. Contains 328315 sequences. (Running on oeis4.)