OFFSET
1,1
COMMENTS
All terms are divisible by a(1)=720, the first entry.
All terms[=a(j)], not only arguments[=j] have 3 distinct prime factors at exponents determined by the p,q,r factors of their arguments: a(pqr)=RPQ.
LINKS
David A. Corneth, Table of n, a(n) for n = 1..835
FORMULA
a(n) = A005179(A007304(n)); Min{x; A000005(x)=pqr} p, q, r are distinct primes. If k = pqr and p > q > r then A005179(k) = 2^(p-1)*3^(q-1)*5^(r-1).
From Reinhard Zumkeller, Jul 15 2004: (Start)
a(p*m*q) = 2^(q-1) * 3^(m-1) * 5^(p-1) for primes p < m < q;
CROSSREFS
KEYWORD
nonn
AUTHOR
Labos Elemer, Jun 05 2001
EXTENSIONS
Edited by N. J. A. Sloane, Apr 20 2007
STATUS
approved