22004

Appears in sequences

• Indices n such that A134204(n) < n.at n=30A133242
• Number of unlabeled rooted trees with n nodes such that the minimal outdegree of inner nodes equals 3.at n=22A244457
• Partial sums of the number of active (ON, black) cells in n-th stage of growth of two-dimensional cellular automaton defined by "Rule 454", based on the 5-celled von Neumann neighborhood.at n=43A272278
• a(n) = Sum_{i=1..n} sigma(i)*sigma(i+1), where sigma(n) = A000203(n) is the sum of the divisors of n.at n=28A330322
• a(n) = Sum_{k=0..n} binomial(4*k,n-k) * Catalan(k).at n=7A360082