A175501 a(n) = the number of divisors of A175500(n).

1, 2, 2, 3, 2, 4, 2, 6, 4, 3, 4, 4, 5, 2, 8, 2, 9, 4, 6, 2, 10, 2, 12, 6, 3, 6, 8, 4, 8, 6, 6, 7, 4, 12, 2, 5, 4, 10, 4, 9, 2, 16, 2, 15, 4, 16, 4, 18, 4, 14, 2, 20, 4, 15, 2, 18, 8, 3, 8, 8, 12, 4, 20, 2, 14, 6, 12, 8, 10, 6, 10, 8, 9, 6, 16, 6, 9, 8, 16, 8

Offset

1,2

Comments

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

Links

Paul Tek, Table of n, a(n) for n = 1..2473

Crossrefs

Cf. A175500.

Sequence in context: A366293 A293442 A318470 * A144370 A239514 A304464

Adjacent sequences: A175498 A175499 A175500 * A175502 A175503 A175504

Keyword

nonn

Author

Leroy Quet, May 31 2010

Extensions

Terms a(26) and beyond from b-file by Andrew Howroyd, Feb 05 2018

Status

approved