OFFSET
0,1
COMMENTS
The next term, a(5), is 1 0^1000099 1^100010, a number with 1100110 digits, and is too large to display here.
a(n) = index of first n in A100961.
REFERENCES
M. E. Coppenbarger, Iterations of a modified Sisyphus function, Fib. Q., 56 (No. 2, 2018), 130-141.
EXAMPLE
0 -> 110 -> 312 reaches 312 in two steps, so a(2) = 0.
CROSSREFS
KEYWORD
nonn,base
AUTHOR
N. J. A. Sloane, May 12 2019
STATUS
approved