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 A324218 Number of connected n-regular loopless multigraphs on six unlabeled nodes. 5
 0, 0, 1, 6, 19, 49, 120, 263, 571, 1149, 2259, 4218, 7679, 13437, 22952, 38013, 61580, 97309, 150838, 229045, 342048, 502066, 726318, 1035482, 1457677, 2026369, 2785873, 3788494, 5101847, 6805192, 8998964, 11799997, 15353938, 19829063, 25431994, 32400113, 41021075, 51623423 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,4 COMMENTS Multigraphs are loopless. Terms computed using 'nauty and Traces' (see the link). LINKS Table of n, a(n) for n=0..37. Brendan McKay and Adolfo Piperno, nauty and Traces PROG (nauty/shell) for ((n=0; n<50; n++)); do geng -c -d1 6 -q | multig -r\${n} -u; done CROSSREFS Row n=6 of A328682. Cf. A324221, A324217. Sequence in context: A073362 A095264 A269059 * A229731 A360951 A271904 Adjacent sequences: A324215 A324216 A324217 * A324219 A324220 A324221 KEYWORD nonn AUTHOR Natan Arie Consigli, Feb 25 2019 STATUS approved

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Last modified May 18 02:01 EDT 2024. Contains 372615 sequences. (Running on oeis4.)