login
a(1)=1. a(n) = A005179(d(a(n-1))) + a(n-1), where d(n) = the number of divisors of n, and A005179(n) is the smallest positive integer with exactly n divisors.
0

%I #8 Mar 11 2014 01:32:51

%S 1,2,4,8,14,20,32,44,56,80,128,152,176,224,284,296,320,512,560,800,

%T 980,1160,1280,1460,1520,1760,2120,2240,3200,3560,3680,4040,4160,5120,

%U 8192,8384,8576,8696,8720,8960,10220,10580,10760,10880,11720,11840,12800

%N a(1)=1. a(n) = A005179(d(a(n-1))) + a(n-1), where d(n) = the number of divisors of n, and A005179(n) is the smallest positive integer with exactly n divisors.

%K nonn

%O 1,2

%A _Leroy Quet_, Mar 24 2010

%E More terms from _R. J. Mathar_, Oct 03 2010