117712

Appears in sequences

• Numbers k such that A007923(k) is prime.at n=19A075766
• a(n) = 7^n + 2^n - 1.at n=6A155590
• Number of (w,x,y,z) with all terms in {0,...,n} and |w-x|=max{w,x,y,z}-min{w,x,y,z}.at n=27A212755