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A173565 Arises in analysis of Algorithm O for generating oriented trees. 0
0, 0, 1, 2, 5, 9, 22, 48, 118, 288 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

REFERENCES

D. E. Knuth, The Art of Computer Programming, Vol. 4A, Section 7.2.1.6, p. 802.

LINKS

Table of n, a(n) for n=1..10.

CROSSREFS

Sequence in context: A218966 A029726 A052962 * A268651 A002935 A128266

Adjacent sequences:  A173562 A173563 A173564 * A173566 A173567 A173568

KEYWORD

nonn

AUTHOR

N. J. A. Sloane, Aug 03 2011

STATUS

approved

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Last modified May 11 21:35 EDT 2021. Contains 343808 sequences. (Running on oeis4.)