31135

Appears in sequences

• Numbers k such that 141*2^k+1 is prime.at n=45A032420
• a(0) = 0, a(n+1) = a(n) + next prime larger than a(n).at n=14A063807
• Convolution of A015723 and A000700.at n=36A274352
• Composite numbers k such that 2^k == 1 (mod cototient(k)).at n=6A291619
• Numbers m such that sigma(m) = tau(m)! where sigma(k) = A000203(k) and tau(k) = A000005(k).at n=18A351866