1563151

Appears in sequences

• Pentagonal numbers (A000326) that are also brilliant numbers (A078972).at n=30A113941
• Strong pseudoprimes to bases 3 and 5.at n=3A215566
• Semiprimes of the form (4*n + 1)*(6*n + 1) = 24*n^2 + 10*n + 1.at n=32A255584
• Numbers k > 2 such that 3^(k-1) == 1 (mod k) and gcd(k, 2^(k-1)-1) = 1.at n=28A306144