1,5

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

a(n) = A032742(n+1)-1.

a(n) = n - A032742(n+1) iff n is odd.

a(n) = 0 iff n+1 is prime.

Table[Floor[n/FactorInteger[n+1][[1, 1]]], {n, 100}] (* Harvey P. Dale, Aug 05 2014 *)

Cf. A020639.

Sequence in context: A338490 A213607 A298932 * A208435 A208457 A232343

Adjacent sequences: A089193 A089194 A089195 * A089197 A089198 A089199

nonn

Reinhard Zumkeller, Dec 08 2003

approved