237407

Appears in sequences

• Perimeter s/6 (divided by 6) of primitive Pythagorean triangles such that perimeters are Averages of twin prime pairs, q=p+1, a=q^2-p^2, c=q^2+p^2, b=2*p*q, s=a+b+c, s-+1 are primes.at n=31A155176
• Semiprimes of the form n*(3*n-1)/2.at n=36A245365
• Semiprimes of the form p(6p - 1).at n=22A330409