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A060335
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Number of n-node acyclic digraphs with 3 out-points.
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0
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1, 28, 1610, 211820, 64144675, 44218682312, 68501035223124, 235728863806525320, 1784437537982029455525, 29470895991194487015464740, 1054563682428338672254476697886, 81276604641664521211218527866093204
(list; graph; refs; listen; history; internal format)
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OFFSET
| 3,2
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REFERENCES
| R. W. Robinson, Counting labeled acyclic digraphs, pp. 239-273 of F. Harary, editor, New Directions in the Theory of Graphs. Academic Press, NY, 1973.
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CROSSREFS
| Cf. A058876, A003025, A003026.
Sequence in context: A042515 A042512 A163033 * A194190 A190397 A004705
Adjacent sequences: A060332 A060333 A060334 * A060336 A060337 A060338
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KEYWORD
| nonn
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AUTHOR
| Vladeta Jovovic (vladeta(AT)eunet.rs), Apr 10 2001
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