A038783 An intermediate sequence for nonisomorphic circulant undirected p^2-graphs, indexed by odd primes p.

4, 10, 24, 208, 700, 8230, 29144, 381304, 19175140, 71582944, 3817763740, 54975633976, 209430787824, 3059510616424, 173215372864600, 9938978487990064, 38430716856090160, 2235968978631715024, 33731189163354610720, 131176846748288854980, 7749524484709164817824

Offset

1,1

Links

Table of n, a(n) for n=1..21.

M. Klin, V. A. Liskovets and R. Poeschel, Analytical enumeration of circulant graphs with prime-squared vertices, Sem. Lotharingien de Combin., B36d, 1996, 36 pages.

Formula

a(n) = A038782(n) - A038781(n) + A038784(n).

Crossrefs

Cf. A038781.

Sequence in context: A001868 A217696 A223014 * A127070 A365861 A107961

Adjacent sequences: A038780 A038781 A038782 * A038784 A038785 A038786

Keyword

nonn,easy

Author

N. J. A. Sloane, May 04 2000

Extensions

More terms from Valery A. Liskovets, May 09 2001

More terms and offset corrected by Sean A. Irvine, Feb 14 2021

Status

approved