104132

Appears in sequences

• Triangular array read by rows: for n, k >= 1, a(n+1, 1) = 2*a(n, n); a(n+1, k+1) = a(n, k)+a(n+1, k).at n=37A129340
• Numbers k such that (26*10^k - 503)/9 is prime.at n=22A296051