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A075545 Number of connected circulant graphs on n nodes. 1
1, 1, 1, 2, 2, 5, 3, 8, 6, 16, 7, 38, 13, 43, 40, 72, 35, 178, 59, 314, 195, 407, 187, 1256, 420, 1385, 920, 3054, 1181, 8702, 2191, 8280, 6759, 16423, 11138, 46552, 14601, 58227, 44409, 135784, 52487, 354951, 99879, 432158, 351374, 762419, 364723, 2121560, 798948, 3355968 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

COMMENTS

Computed by Brendan McKay.

LINKS

Table of n, a(n) for n=1..50.

Eric Weisstein's World of Mathematics, Circulant Graph

FORMULA

Moebius transform of A049287. - Andrew Howroyd, Nov 04 2017

MATHEMATICA

CountDistinct /@ Table[Select[CanonicalGraph[CirculantGraph[n, #]] & /@ Subsets[Range[Floor[n/2]]], ConnectedGraphQ], {n, 25}] (* Eric W. Weisstein, May 13 2017 *)

CROSSREFS

Cf. A049287.

Sequence in context: A266981 A045893 A071939 * A006307 A152991 A163298

Adjacent sequences:  A075542 A075543 A075544 * A075546 A075547 A075548

KEYWORD

nonn

AUTHOR

Eric W. Weisstein, Sep 22 2002

EXTENSIONS

a(1) changed to 1 by Andrew Howroyd, Apr 24 2017

a(41)-a(50) from Andrew Howroyd, Nov 04 2017

STATUS

approved

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Last modified August 18 01:19 EDT 2019. Contains 326059 sequences. (Running on oeis4.)