57050

Appears in sequences

• E.g.f.: -arcsin(x)*LambertW(-x).at n=7A277483
• Smallest k such that (k+i)*prime(n)# - 1 is prime for i = 0, 1, 2, 3, 4 with prime(n)# = A002110(n) the n-th primorial, n>1.at n=22A277691