A139696 a(n) = the number of divisors of A139695(n).

1, 2, 4, 7, 3, 8, 2, 9, 17, 8, 18, 7, 19, 6, 20, 5, 21, 4, 22, 3, 23, 2, 24, 47, 23, 48, 22, 49, 21, 50, 80, 111, 143, 176, 210, 245, 209, 246, 208, 169, 129, 88, 130, 87, 43, 88, 42, 89, 41, 90, 40, 91, 39, 92, 38, 93, 37, 94, 36, 95, 35, 96, 34, 97, 33, 98, 32, 99, 31, 100, 30

Offset

1,2

Comments

|a(n)-a(n-1)| = n-1 for all integers >= 2.

Links

Ray Chandler, Table of n, a(n) for n=1..90

Crossrefs

Cf. A139695.

Sequence in context: A356432 A303641 A137282 * A308049 A084332 A081145

Adjacent sequences: A139693 A139694 A139695 * A139697 A139698 A139699

Keyword

nonn

Author

Leroy Quet, Apr 29 2008

Extensions

a(10)-a(90) from Ray Chandler, Jul 08 2009

Status

approved