OFFSET
1,2
COMMENTS
LINKS
EXAMPLE
The first terms, alongside their prime factorizations, are:
n a(n) n a(n)
-- ---- --------- ----------
1 1 1 1
2 2 2 2
3 3 3 3
4 6 2 * 2 2 * 3
5 10 5 2 * 5
6 10 2 * 3 2 * 5
7 14 7 2 * 7
8 28 2 * 2 * 2 2 * 2 * 7
9 42 3 * 3 2 * 3 * 7
10 42 2 * 5 2 * 3 * 7
11 66 11 2 * 3 * 11
12 66 2 * 2 * 3 2 * 3 * 11
PROG
(PARI) See Links section.
CROSSREFS
KEYWORD
nonn
AUTHOR
Rémy Sigrist, Apr 02 2021
STATUS
approved