OFFSET
1,1
LINKS
Paolo P. Lava, Table of n, a(n) for n = 1..100
EXAMPLE
a(5)=104. Iteration 1: 104=2*2*2*13 and sum of factors is 19; 104-19=85. Iteration 2: 85=5*17; 85-22=63. Iterations 3,4,5 produce 63-13=50, 50-12=38 and 38-21=17, a prime.
CROSSREFS
KEYWORD
nonn
AUTHOR
Enoch Haga, Feb 28 2000
STATUS
approved