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 A289988 Number of unlabeled connected loopless multigraphs with n nodes of degree n or less. 3
 1, 1, 2, 4, 37, 602, 34126, 6021463, 3616906549, 7361925161868, 51324462383008758, 1240420936122453106498, 105141919479926837860474091, 31581183353539008502807807352728 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,3 COMMENTS Multigraphs are loopless. LINKS Table of n, a(n) for n=0..13. PROG (nauty/bash) for n in {1..8}; do geng -c -D\${n} \${n} -q | multig -m\$[\${n}-1] -D\$[\${n}-1] -u; done CROSSREFS Main diagonal of A334546. Cf. A007719, A076864, A134818, A289157, A289158, A289987. Sequence in context: A212775 A115250 A018304 * A051692 A053745 A019275 Adjacent sequences: A289985 A289986 A289987 * A289989 A289990 A289991 KEYWORD nonn,more AUTHOR Natan Arie Consigli, Aug 19 2017 EXTENSIONS a(0) corrected and a(9)-a(13) from Andrew Howroyd, May 05 2020 STATUS approved

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Last modified March 2 05:08 EST 2024. Contains 370460 sequences. (Running on oeis4.)