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 A185214 Number of disconnected regular simple graphs on n vertices with girth at least 4. 17
 0, 0, 1, 1, 2, 1, 2, 1, 3, 2, 4, 3, 7, 5, 10, 8, 22, 12, 54, 20, 218, 62, 1436, 1731, 27810, 197981, 2613814, 33117962, 463707741, 6709514340, 102306352539, 1597440872801 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,5 LINKS CROSSREFS This sequence is the row sum sequence of A185204. Regular graphs, of any degree, with girth at least 4: A186724 (connected), this sequence (disconnected), A185314 (not necessarily connected). Disconnected k-regular simple graphs with girth at least 4: this sequence (any k), A185204 (triangle); specified degree k: A185224 (k=2), A185234 (k=3), A185244 (k=4), A185254 (k=5), A185264 (k=6), A185274 (k=7), A185284 (k=8), A185294 (k=9). Sequence in context: A161257 A161282 A226517 * A241719 A269572 A029198 Adjacent sequences:  A185211 A185212 A185213 * A185215 A185216 A185217 KEYWORD nonn,more,hard AUTHOR Jason Kimberley, Mar 26 2012 EXTENSIONS a(31) corrected by the author, propagated from A185244, Jan 05 2013 STATUS approved

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Last modified January 24 10:33 EST 2020. Contains 331193 sequences. (Running on oeis4.)