

A240822


a(n) = index of first nonexisting term of the metaFibonacci sequence {f(k) = k for k <= n; f(k)=f(kf(k1))+f(kf(kn))} if that sequence is only defined for finitely many terms, or 0 if that sequence is infinite.


2



7, 0, 163, 0, 57, 2350, 277, 1301, 85, 1246, 357, 409, 487, 471, 765
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OFFSET

1,1


COMMENTS

a(2)=0 and a(4)=0 are conjectural.
Except for the two zero entries, this is equal to A240818(n)+1. See that entry for further information.
Similar to A134680 and A240810.


LINKS

Table of n, a(n) for n=1..15.
B. Balamohan, A. Kuznetsov and S. Tanny, On the behavior of a variant of Hofstadter's Qsequence, J. Integer Sequences, Vol. 10 (2007), #07.7.1.
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 A240818 for another version.
A diagonal of the triangle in A240825.
Cf. A134680, A240810.
Sequence in context: A046273 A167317 A266436 * A240810 A024094 A157307
Adjacent sequences: A240819 A240820 A240821 * A240823 A240824 A240825


KEYWORD

nonn,more


AUTHOR

N. J. A. Sloane, Apr 15 2014


STATUS

approved



