50696

Appears in sequences

• Numbers k such that 27*2^k+1 is prime.at n=32A032363
• Numbers k such that z(k) = j(k), where z(k) = sopf(k - d(k)), j(k) = d(sopf(k) + k), sopf(k) = A008472(k) and d(k) = A000005(k).at n=37A063961
• Indices of prime tetranacci numbers.at n=11A104534