422240040001
domain: N
Appears in sequences
- Composite numbers such that n^(b^n) == (-1)^b (mod C_b(n)), where C_b(n) = n*b^n+1 (A210339).at n=2A246809
- Carmichael numbers (A002997) k such that k-1 is a square.at n=4A265285
- Carmichael numbers (A002997) k such that k-1 is a perfect power (A001597).at n=8A265328
- Numbers of the form n^2+1 that divide 4^n-1.at n=13A273999