OFFSET
1,1
COMMENTS
LINKS
Charles R Greathouse IV and Peter J. C. Moses, Table of n, a(n) for n = 1..10000 (first 500 from Moses)
EXAMPLE
For triple of evil primes {3,29,263} numbers 3*29 = 87, 3*263 = 789, 29*263 = 7627 and 3*29*263 = 22881. Thus 22881 is in the sequence.
PROG
(PARI) od(n)=hammingweight(n)%2
list(lim)=my(v=List(), pq); forprime(p=23, lim\25, if(od(p), next); forprime(q=5, min(lim\(3*p), p), if(od(q) || !od(pq=p*q), next); forprime(r=3, min(lim\pq, q), if(!od(r) && od(q*r) && od(p*r) && od(pq*r), listput(v, pq*r))))); vecsort(Vec(v)) \\ Charles R Greathouse IV, Nov 01 2013
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Vladimir Shevelev and Peter J. C. Moses, Oct 16 2013
STATUS
approved