

A240824


a(n) = index of first nonexisting term of the metaFibonacci sequence {f(k) = k for k <= n; f(k)=f(kf(k3))+f(kf(kn))} if that sequence is only defined for finitely many terms, or 0 if that sequence is infinite.


1



21, 72, 35, 0, 47, 35, 37, 40, 91, 0, 143, 71, 92
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OFFSET

3,1


COMMENTS

a(6)=0 and a(12)=0 are only conjectures.
Except for the zero entries, this is equal to A240820(n)+1. See that entry for further information.


REFERENCES

D. R. Hofstadter, Curious patterns and nonpatterns in a family of metaFibonacci recursions, Lecture in Doron Zeilberger's Experimental Mathematics Seminar, Rutgers University, April 10 2014.


LINKS

Table of n, a(n) for n=3..15.
D. R. Hofstadter, Curious patterns and nonpatterns in a family of metaFibonacci recursions, Lecture in Doron Zeilberger's Experimental Mathematics Seminar, Rutgers University, April 10 2014; Part 1, Part 2.
Index entries for Hofstadtertype sequences


CROSSREFS

See A240820 for another version.
A diagonal of the triangle in A240825.
Sequence in context: A187719 A156285 A160435 * A109357 A283802 A082041
Adjacent sequences: A240821 A240822 A240823 * A240825 A240826 A240827


KEYWORD

nonn,more


AUTHOR

N. J. A. Sloane, Apr 15 2014


STATUS

approved



