A038787 An intermediate sequence for nonisomorphic circulant self-complementary directed p^2-graphs, indexed by odd primes p.

2, 6, 12, 104, 356, 4134, 14572, 190652, 9588156, 35791472, 1908889156, 27487843256, 104715393912, 1529755308212, 86607687722856, 4969489243995032, 19215358445940816, 1117984489315857512, 16865594581677305360, 65588423375098872068, 3874762242354582408912

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(p^2) = A038791(p^2) for p=4k-1.

a(p^2) = A038786(p^2) - A038785(p^2) + A038788(p^2).

Crossrefs

Cf. A038785.

Sequence in context: A129085 A274941 A141288 * A144098 A259140 A075071

Adjacent sequences: A038784 A038785 A038786 * A038788 A038789 A038790

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