OFFSET
1,1
COMMENTS
Subsequence of odd terms of A026424. - Michel Marcus, Jul 04 2015
The sequence a(1)=0, for n>1 a(n) is smallest number such that for all s,t,m<n a(n) != a(s)*a(t)+a(m) is the same as this one from a(3). - Anders Hellström, Jul 08 2015
LINKS
Harry J. Smith, Table of n, a(n) for n = 1..1000
EXAMPLE
a(9) = 27, which is odd with an odd number of prime factors, i.e., 3.
PROG
(PARI) { n=0; forstep (m=1, 10^10, 2, if (bigomega(m)%2 == 1, write("b067019.txt", n++, " ", m); if (n==1000, return)) ) } \\ Harry J. Smith, Apr 25 2010
CROSSREFS
Cf. A353558 (characteristic function).
KEYWORD
nonn
AUTHOR
Shyam Sunder Gupta, Feb 16 2002
STATUS
approved