194482

Appears in sequences

• a(n) = n^4 + 1.at n=21A002523
• a(n) = Sum_{d|n, d==1 (mod 4)} d^4.at n=20A050448
• a(n) = Sum_{d|n, d==1 (mod 4)} d^4.at n=41A050448
• a(n) = Sum_{d|n, n/d=1 mod 4} d^4.at n=20A050463
• Semiprimes of the form n^4 + 1.at n=11A186688
• Numbers k such that either (a) k-1=i^m for some i and m >= 3 and k+1 is a prime, or (b) k-1 is a prime and k+1 = i^m for some i and m >= 3.at n=23A329595
• Numbers k such that k-1 is a perfect square and k+1 is prime.at n=38A392249