The OEIS is supported by the many generous donors to the OEIS Foundation. Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A184980 Irregular triangle C(n,g) counting the connected 8-regular simple graphs on n vertices with girth exactly g. 8
 1, 1, 6, 94, 10786, 3459386, 1470293676, 733351105934, 1 (list; graph; refs; listen; history; text; internal format)
 OFFSET 9,3 COMMENTS The first column is for girth at least 3. The row length is incremented to g-2 when 2n reaches A054760(8,g). LINKS Table of n, a(n) for n=9..17. Jason Kimberley, Index of sequences counting connected k-regular simple graphs with girth exactly g EXAMPLE 1; 1; 6; 94; 10786; 3459386; 1470293676; 733351105934, 1; ?, 0; ?, 1; ?, 0; ?, 13; ?, 1; CROSSREFS Connected 8-regular simple graphs with girth at least g: A184981 (triangle); chosen g: A014378 (g=3), A181154 (g=4). Connected 8-regular simple graphs with girth exactly g: this sequence (triangle); chosen g: A184983 (g=3). Triangular arrays C(n,g) counting connected simple k-regular graphs on n vertices with girth exactly g: A198303 (k=3), A184940 (k=4), A184950 (k=5), A184960 (k=6), A184970 (k=7), this sequence (k=8). Sequence in context: A198257 A296820 A184983 * A184981 A014378 A180260 Adjacent sequences: A184977 A184978 A184979 * A184981 A184982 A184983 KEYWORD nonn,hard,more,tabf AUTHOR Jason Kimberley, Jan 19 2012 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified June 7 21:29 EDT 2023. Contains 363157 sequences. (Running on oeis4.)