116514

Appears in sequences

• Numbers k such that 2*10^k + 3*R_k is prime, where R_k = 11...1 is the repunit (A002275) of length k.at n=27A056701
• a(n) = (1/9)(2^(n+3)-(-1)^n(3n-1)).at n=17A103196
• Expansion of (1-2x^2)/((1-2x)(1+x)^2).at n=19A113954
• Least number x such that x^n has n digits equal to k. Case k = 3.at n=31A285450