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

1,2

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

Sequence in context: A333937 A325785 A207632 * A333389 A352286 A352259

Adjacent sequences: A175500 A175501 A175502 * A175504 A175505 A175506

Keyword

nonn

Author

Leroy Quet, May 31 2010

Extensions

More terms from Ivan Neretin, Jun 05 2016

Status

approved