168600domain: NAppears in sequencesNumbers m such that N=(am+1)(bm+1)(cm+1) is a 3-Carmichael number (A087788), where a,b,c = 1,2,23.at n=17A064248a(n) = Sum_{k=0..3} f(n+k)^2 where f=A130519.at n=40A238604