OFFSET
1,1
COMMENTS
Claimed to be the maximum k such that n is the k-th term in some Fibonacci-type sequence.
LINKS
Tamás Dénes, Problem 413. Fibonacci index of natural numbers, Research problems / Discrete Mathematics 272 (2003) 301-306 (but there are several errors in the table given there).
CROSSREFS
KEYWORD
dead
STATUS
approved