1,4
Huaien Li and David C. Torney, Enumerations of Multigraphs, 2002.
Sequence in context: A117187 A138767 A048282 this_sequence A135944 A076821 A165825
Adjacent sequences: A068589 A068590 A068591 this_sequence A068593 A068594 A068595
nonn
Huaien Li and David C. Torney (huaien_li(AT)hotmail.com), Mar 27 2002
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