50149

Appears in sequences

• Thickened pyramidal numbers: a(n) = 2*(n+1)*n + Sum_{i=1..n} (4*i*(i-1) + 1).at n=33A050533
• Concatenation of n-th nonprime and n-th prime.at n=34A253911
• Numbers k such that (52*10^k + 119)/9 is prime.at n=21A294229