A061848 An intermediate sequence for nonisomorphic circulant self-complementary undirected p^2-graphs, indexed by odd primes p.

0, 2, 0, 0, 12, 38, 0, 0, 1172, 0, 14572, 52536, 0, 0, 2581112, 0, 35791472, 0, 0, 1908889156, 0, 0, 399822600756, 5864062716964, 22517998136936, 0, 0, 333599972407532, 1286742760265468, 0, 0, 4340410370789890656, 0, 255263053128088930472, 0

Offset

3,2

Comments

a(p^2)=0 for p=4k-1

Links

Table of n, a(n) for n=3..37.

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)= A061847(p^2) - A061846(p^2) + A061849(p^2)

Crossrefs

Cf. A038787.

Sequence in context: A244139 A350732 A231031 * A193294 A231049 A231080

Adjacent sequences: A061845 A061846 A061847 * A061849 A061850 A061851

Keyword

nonn

Author

Valery A. Liskovets, May 09 2001

Extensions

More terms from Sean A. Irvine, Mar 09 2023

Status

approved