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A350752
Number of unlabeled strongly connected digraphs with n arcs.
10
1, 0, 1, 1, 3, 6, 25, 91, 442, 2241, 12591, 75180, 478648, 3211245, 22635956, 166828221, 1281518573, 10229858290, 84652925554, 724601312400, 6403522811765, 58327076550161, 546764617643250, 5267719312771122, 52096218005705959, 528285485054771639
OFFSET
0,5
PROG
(PARI) A350752seq(20) \\ See PARI link in A350489 for program code.
CROSSREFS
Row sums of A350753.
Column sums of A057276.
Sequence in context: A361288 A266549 A057730 * A355967 A074432 A212650
KEYWORD
nonn
AUTHOR
Andrew Howroyd, Jan 13 2022
STATUS
approved