36084

Appears in sequences

• a(n) = sigma_3(n) - sigma_2(n).at n=31A092349
• Number of functional patterns on n elements; or digraphs with maximum outdegree 1, n arrows and every point connected to an arrow.at n=10A116950
• a(2)=5; thereafter a(n) = smallest number m such that a(n-1)+m = (a(n-1) followed by the leading digit of m).at n=4A224756
• Expansion of (1+4*x+8*x^2-x^3)/((1-x)*(1+x)*(1-3*x^2)).at n=17A224785
• Maximal sum of x0 + x0*x1 + ... + x0*x1*...*xk over all compositions x0 + ... + xk = n.at n=27A239288
• Numbers k such that (prime(j)-1)^2 + 1 is prime for k <= j <= k + 2.at n=25A376522
• Numbers k such that sigma(k) = psi(k) + phi(k) + omega(k)^5.at n=3A391908