Devaraj numbers: squarefree r-prime-factor (r>1) integers N=p1*...*pr such that phi(N)=(p1-1)*...*(pr-1) divides gcd(p1-1,...,pr-1)^2*(N-1)^(r-2).
561, 1105, 1729, 2465, 2821, 6601, 8911, 10585, 11305, 15841, 29341, 39865
1 seqfan posts
Thu Dec 16 00:17:58 CET 2010 [seqfan] reducing Devaraj non-Carmichel numbers in A164946