A175503 a(n) = the number of divisors of A175502(n).

1, 2, 2, 3, 4, 2, 6, 4, 4, 5, 2, 8, 3, 6, 6, 8, 4, 9, 2, 10, 4, 12, 2, 7, 4, 16, 2, 15, 4, 18, 2, 14, 3, 3, 12, 6, 10, 8, 8, 5, 6, 9, 8, 12, 12, 10, 3, 16, 6, 20, 2, 24, 4, 14, 6, 18, 8, 16, 12, 9, 10, 10, 16, 9, 3, 18, 12, 15, 6, 24, 8, 20, 4, 21, 2, 30, 4, 32, 2, 27

Offset: 1

Author

Leroy Quet, May 31 2010

Keywords

• nonn

Comments

Each unordered pair {a(k),a(k-1)} occurs at most once in the sequence.

Links

• Ivan Neretin, Table of n, a(n) for n = 1..1000

Crossrefs

Cf. A175502

Extensions

More terms from Ivan Neretin, Jun 05 2016