90588

Appears in sequences

• Numbers k such that (86*10^k + 121)/9 is prime.at n=26A283185
• Square array A(n,k), n >= 0, k >= 0, read by antidiagonals downwards, where column k is the expansion of e.g.f. B(x)^k, where B(x) is the e.g.f. of A384740.at n=41A384742