A173565 Arises in analysis of Algorithm O for generating oriented trees.

0, 0, 1, 2, 5, 9, 22, 48, 118, 288

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 A342556 A002935

Adjacent sequences: A173562 A173563 A173564 * A173566 A173567 A173568

Keyword

nonn

Author

N. J. A. Sloane, Aug 03 2011

Status

approved