OFFSET
1,2
COMMENTS
Conjugate the partition defined by the prime factorization of n (see, e.g., table A112798 or A241918), resulting k = A122111(n), then take the k-th odd number (2k-1), and conjugate again, giving a(n) = A122111(2k-1).
Thus after a(1)=1, this is a permutation of A070003 (numbers divisible by the square of their largest prime factor).
FORMULA
PROG
CROSSREFS
KEYWORD
nonn
AUTHOR
Antti Karttunen, Jan 17 2015
STATUS
approved