A038784 An intermediate sequence for nonisomorphic circulant undirected p^2-graphs, indexed by odd primes p.
4, 9, 16, 64, 196, 1296, 3600, 35344, 1397124, 4804864, 213218404, 2754990144, 9976014400, 133023596176, 6663770519184, 342723467635264, 1281107924034624, 67756702226982976, 963748303995476224, 3643830108147610000, 198705767966065582336, 2876682497805092456704
Offset: 1
Links
- 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) = A049287(p)^2.
Extensions
More terms from Valery A. Liskovets, May 09 2001
More terms and offset corrected by Sean A. Irvine, Feb 14 2021