201646

Appears in sequences

• Start with 1, apply 1->12, 21->21, 22->21, 2->2 (for final 2); a(n) = length of n-th term.at n=38A013950
• a(n) = Sum_{k=1..n} gcd(k,n)^(n/gcd(k,n)).at n=27A342424