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Search: id:A053454
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A053454 Number of connected digraphs with n arcs. +0
1
1, 4, 12, 53, 237, 1306, 7537, 47913, 322253, 2297874, 17191216, 134505656, 1095715055, 9267223594, 81162609328 (list; graph; listen)
OFFSET

1,2
CROSSREFS

Cf. A003085, A053418.

Sequence in context: A065525 A149413 A149414 this_sequence A149415 A149416 A149417

Adjacent sequences: A053451 A053452 A053453 this_sequence A053455 A053456 A053457

KEYWORD

nonn

AUTHOR

Vladeta Jovovic (vladeta(AT)eunet.rs), Jan 12 2000

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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