116557

Appears in sequences

• Base 5 digits are, in order, the first n terms of the periodic sequence with initial period 1,2,2.at n=7A037546
• Numbers k such that 10^k + 987654321 is prime.at n=22A248351
• G.f.: Sum_{n>=0} x^n/(1-x)^(5*n) * Sum_{k=0..n} C(n,k)^2 * x^k.at n=8A249793
• Expansion of the e.g.f. 1 / sqrt(3 - 2 / ((1 - x)*exp(x))).at n=8A345969