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A350794
Number of digraphs on n unlabeled nodes with a global source and sink.
24
1, 1, 2, 20, 574, 48854, 12444800, 9849180230, 25265372689314, 218451490123178684, 6562780921564838071734, 700270642102506752862044142, 269621199012416753533007480951824, 378982029174285293421133982496722212766, 1962119228020498122395242424575089505014761082
OFFSET
1,3
LINKS
Andrew Howroyd, PARI Program, Jan 2022, updated Mar 2023.
PROG
(PARI) A350794seq(15) \\ See link for program code.
CROSSREFS
The labeled version is A350790.
Row sums of A350795.
Sequence in context: A101927 A341269 A157317 * A009399 A275779 A292415
KEYWORD
nonn
AUTHOR
Andrew Howroyd, Jan 19 2022
STATUS
approved