94801

Appears in sequences

• Numbers k such that 21*2^k+1 is prime.at n=34A032360
• Sum of the k-th pi-based arithmetic derivative of n-k for k=0..n.at n=17A258847
• a(n) = Sum_{k=0..floor(n/4)} 2^k * binomial(2*n-6*k,2*k).at n=17A387623