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 A185264 Number of disconnected 6-regular simple graphs on n vertices with girth at least 4. 12
 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 0, 1, 1, 10, 7, 277, 3742, 483330, 69827771, 14836620025 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,29 LINKS FORMULA a(n) = A185364(n) - A058276(n) = Euler_transformation(A058276)(n) - A058276(n). CROSSREFS 6-regular simple graphs with girth at least 4: A058276 (connected), this sequence (disconnected), A185364 (not necessarily connected). Disconnected k-regular simple graphs with girth at least 4: A185214 (any k), A185204 (triangle); specified degree k: A185224 (k=2), A185234 (k=3), A185244 (k=4), A185254 (k=5), this sequence (k=6), A185274 (k=7), A185284 (k=8), A185294 (k=9). Sequence in context: A210283 A227473 A038309 * A128357 A024134 A180197 Adjacent sequences:  A185261 A185262 A185263 * A185265 A185266 A185267 KEYWORD nonn,more,hard AUTHOR Jason Kimberley, Feb 22 2011 STATUS approved

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Last modified August 4 09:30 EDT 2021. Contains 346446 sequences. (Running on oeis4.)