

A049309


Number of nonisomorphic selfcomplementary circulant digraphs (Cayley digraphs for the cyclic group) of order 2n1.


3



1, 1, 2, 2, 3, 4, 8, 20, 20, 30, 88, 94, 214, 457, 596, 1096, 3280, 5560, 7316, 21944, 26272, 49940
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OFFSET

1,3


COMMENTS

There is an easy formula for prime orders. Formulae are also known for squarefree and primesquared orders.
Further values for squarefree and primesquared orders can be found in the Liskovets reference.


LINKS

Table of n, a(n) for n=1..22.
V. A. Liskovets, Some identities for enumerators of circulant graphs, arXiv:math/0104131 [math.CO], 2001.
V. A. Liskovets and R. Poeschel, On the enumeration of circulant graphs of primepower and squarefree orders
R. Poeschel, Publications


CROSSREFS

Cf. A049288, A049289, A049297, A038785.
Sequence in context: A032243 A153922 A153943 * A239967 A205118 A022405
Adjacent sequences: A049306 A049307 A049308 * A049310 A049311 A049312


KEYWORD

nice,nonn


AUTHOR

Valery A. Liskovets


EXTENSIONS

a(14)a(22) from Andrew Howroyd, May 06 2017


STATUS

approved



