A240814 a(n) = index of first nonexisting term of the meta-Fibonacci sequence {f(1) = ... = f(n) = 1; f(k)=f(k-f(k-2))+f(k-f(k-n))} if that sequence is only defined for finitely many terms, or 0 if that sequence is infinite.

15, 55, 0, 38, 31, 64, 369, 48, 47, 109, 189, 119, 63, 210

Offset: 2

Author

N. J. A. Sloane, Apr 15 2014

Keywords

• nonn
• more

Comments

a(4)=0 is only a conjecture.

Except for the zero entry, this is equal to A240811(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

• 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 A240811 for another version.

A diagonal of the triangle in A240816.