OFFSET

1,1

COMMENTS

a(1) = 582169 is the smallest term > 1 of A227891 which does not have an evil prime divisor.

The sequence lists numbers of the form (p*q)^2 such that either q > p are both odious primes and among the numbers {p^2, p*q, q^2, p^2*q, q^2*p} there is exactly one odious, or q=p is an odious prime, while p^2 and p^3 are both evil.

CROSSREFS

KEYWORD

nonn,base

AUTHOR

Vladimir Shevelev and Peter J. C. Moses, Nov 06 2013

STATUS

approved