A240815 a(n) = index of first nonexisting term of the meta-Fibonacci sequence {f(1) = ... = f(n) = 1; f(k)=f(k-f(k-3))+f(k-f(k-n))} if that sequence is only defined for finitely many terms, or 0 if that sequence is infinite.

14, 11, 12, 14, 45, 32, 50, 39, 81, 59, 70, 62, 58

Offset

3,1

Comments

This is equal to A240812(n)+1. See that entry for further information.

Links

Table of n, a(n) for n=3..15.

B. Balamohan, A. Kuznetsov and S. Tanny, On the behavior of a variant of Hofstadter's Q-sequence, J. Integer Sequences, Vol. 10 (2007), #07.7.1.

D. R. Hofstadter, Curious patterns and non-patterns in a family of meta-Fibonacci recursions, Lecture in Doron Zeilberger's Experimental Mathematics Seminar, Rutgers University, April 10 2014; Part 1, Part 2.

Index entries for Hofstadter-type sequences

Crossrefs

See A240812 for another version.

A diagonal of the triangle in A240816.

Sequence in context: A305946 A349806 A259531 * A305938 A206605 A004503

Adjacent sequences: A240812 A240813 A240814 * A240816 A240817 A240818

Keyword

nonn,more

Author

N. J. A. Sloane, Apr 15 2014

Status

approved