A014385 Number of connected regular bipartite graphs of degree 6 with 2n nodes.

1, 1, 7, 157, 62616, 78322916, 147252447227, 376962851057234, 1280344203366849969, 5666901233595672365908, 32193489258177947645878365, 231605871969834571512497704231, 2084558172807256752718977250960988

Offset

6,3

References

CRC Handbook of Combinatorial Designs, 1996, p. 648.

I. A. Faradzev, Constructive enumeration of combinatorial objects, pp. 131-135 of Problèmes combinatoires et théorie des graphes (Orsay, 9-13 Juillet 1976). Colloq. Internat. du C.N.R.S., No. 260, Centre Nat. Recherche Scient., Paris, 1978.

Links

Table of n, a(n) for n=6..18.

B. D. McKay and E. Rogoyski, Latin squares of order ten, Electron. J. Combinatorics, 2 (1995) #N3.

Crossrefs

Column k=6 of A008326.

Sequence in context: A115866 A197766 A009703 * A114485 A061010 A153714

Adjacent sequences: A014382 A014383 A014384 * A014386 A014387 A014388

Keyword

nonn,hard

Author

N. J. A. Sloane

Extensions

More terms from Eric Rogoyski, May 15 1997

a(12)-a(18) from Andrew Howroyd, Apr 04 2020

Status

approved