51208

Appears in sequences

• Number of (w,x,y,z) with all terms in {1,...,n} and w + x > 2y + 2z.at n=25A212564
• Numbers k such that 4*10^k - 87 is prime.at n=21A284191
• a(n) = 1 + a(n-1) * prime(n), starting a(0) = 1.at n=6A350895