A193671 Numbers such that the last of the differences of divisors is > 0.

1, 2, 3, 4, 5, 6, 7, 8, 9, 11, 12, 13, 15, 16, 17, 18, 19, 21, 23, 25, 27, 29, 30, 31, 32, 33, 35, 37, 39, 41, 42, 43, 44, 45, 47, 49, 51, 52, 53, 54, 55, 56, 57, 59, 61, 64, 65, 66, 67, 68, 69, 71, 72, 73, 75, 76, 77, 78, 79, 81, 83, 85, 87, 88, 89, 90, 91

Offset

1,2

Comments

A187202(a(n)) > 0.

Links

Reinhard Zumkeller, Table of n, a(n) for n = 1..10000

Prog

(Haskell)
import Data.List (findIndices)
a193671 n = a193671_list !! (n-1)
a193671_list = map (+ 1) $ findIndices (> 0) $ map a187202 [1..]

Crossrefs

Cf. A187204, A193672.

Sequence in context: A342191 A251726 A362981 * A073491 A066311 A069899

Adjacent sequences: A193668 A193669 A193670 * A193672 A193673 A193674

Keyword

nonn

Author

Reinhard Zumkeller, Aug 02 2011

Status

approved