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A218553 Order of (5,n) cage, i.e., minimal order of 5-regular graph of girth n. 7
6, 10, 30, 42 (list; graph; refs; listen; history; text; internal format)
OFFSET
3,1
COMMENTS
a(7) <= 152, a(8) = 170, a(12) = 2730. - From Royle's page via Jason Kimberley, Dec 21 2012
LINKS
Andries E. Brouwer, Cages
G. Exoo and R. Jajcay, Dynamic cage survey, Electr. J. Combin. (2008, 2011).
Eric Weisstein's World of Mathematics, Cage Graph (claims too much)
FORMULA
a(n) >= A061547(n+1).
CROSSREFS
Orders of cages: A054760 (n,k), A000066 (3,n), A037233 (4,n), this sequence (5,n), A218554 (6,n), A218555 (7,n), A191595 (n,5).
Sequence in context: A271412 A272278 A272508 * A265857 A256865 A163478
KEYWORD
hard,more,nonn
AUTHOR
EXTENSIONS
a(7) deleted by Jason Kimberley, Dec 21 2012
STATUS
approved

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Last modified March 28 10:55 EDT 2024. Contains 371241 sequences. (Running on oeis4.)