

A218554


Order of (6,n) cage, i.e., minimal order of 6regular graph of girth n.


7




OFFSET

3,1


COMMENTS

a(7) <= 294, a(8) = 312, a(12) = 7812.  From Royle's page via Jason Kimberley, Dec 26 2012


LINKS

Table of n, a(n) for n=3..6.
Andries E. Brouwer, Cages
Geoff Exoo, Regular graphs of given degree and girth
G. Exoo and R. Jajcay, Dynamic cage survey, Electr. J. Combin. (2008, 2011).
Gordon Royle, Cages of higher valency
Eric Weisstein's World of Mathematics, Cage Graph (claims too much)


FORMULA

a(n) >= A198306(n).


CROSSREFS

Orders of cages: A054760 (n,k), A000066 (3,n), A037233 (4,n), A218553 (5,n), this sequence (6,n), A218555 (7,n), A191595 (n,5).
Sequence in context: A197229 A316088 A198306 * A113499 A178681 A194264
Adjacent sequences: A218551 A218552 A218553 * A218555 A218556 A218557


KEYWORD

hard,more,nonn


AUTHOR

Arkadiusz Wesolowski, Nov 02 2012


EXTENSIONS

a(7) deleted by Jason Kimberley, Dec 21 2012


STATUS

approved



