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A240824 a(n) = index of first nonexisting term of the meta-Fibonacci sequence {f(k) = k for k <= n; 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. 1
21, 72, 35, 0, 47, 35, 37, 40, 91, 0, 143, 71, 92 (list; graph; refs; listen; history; text; internal format)
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 non-patterns in a family of meta-Fibonacci 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 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 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

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Last modified November 26 12:37 EST 2020. Contains 338639 sequences. (Running on oeis4.)