OFFSET
0,1
COMMENTS
All terms are semiprimes or powers of primes.
LINKS
Paolo P. Lava, Table of n, a(n) for n = 0..165
EXAMPLE
a(36) = 2831 because the aliquot parts of 2831 are 1, 19, 149 and lcm(1 + 36, 19 + 36, 149 + 36) = lcm(37, 55, 185) = 2035 and 2831 is the least composite number to have this property.
MAPLE
with(numtheory): P:=proc(q) local a, h, k, n; for n from 0 to q do for k from 1 to q do
if not isprime(k) then a:=sort([op(divisors(k))]);
for h from 1 to nops(a)-1 do a[h]:=a[h]+n; od; a:={op(a)}; a:=op(a minus {a[nops(a)]});
if lcm(a)<k then print(k); break; fi; fi; od; od; end: P(10^6);
CROSSREFS
KEYWORD
nonn
AUTHOR
Paolo P. Lava, Jan 03 2017
STATUS
approved