26719701
domain: N
Appears in sequences
- Carmichael numbers that are not == 1 mod 12. There are 69 Carmichael numbers out to 2*m+1, m=2*10^6 and all but the above 9 are 1 mod 12.at n=15A110889
- Carmichael numbers not congruent to 1 modulo 6.at n=9A205947
- Carmichael numbers divisible by 3.at n=4A258801
- Carmichael numbers k for which A053575(k) [the odd part of phi] divides k-1.at n=20A339869