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A240822
a(n) = index of first nonexisting term of the meta-Fibonacci sequence {f(k) = k for k <= n; f(k)=f(k-f(k-1))+f(k-f(k-n))} 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, 1173, 259, 357, 806, 820, 1079, 2100, 471, 2594, 663, 1171, 666, 1086, 2105, 1418, 725, 1197, 1248, 1629, 649, 2241, 713, 2305, 1837, 1425, 1083, 2760, 1265, 1571, 2236, 1513, 1443, 2448
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
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.
CROSSREFS
See A240818 for another version.
A diagonal of the triangle in A240825.
Sequence in context: A046273 A167317 A266436 * A240810 A024094 A157307
KEYWORD
nonn
AUTHOR
N. J. A. Sloane, Apr 15 2014
EXTENSIONS
More terms from Max Alekseyev, Sep 19 2023
STATUS
approved