30342

Appears in sequences

• Expansion of x*(1-2*x^2)/(1-x-2*x^2)^2.at n=14A091596
• Least k such that k * M(n) * M(n+1) + 1 is prime where M(n) = A000668(n).at n=23A098917
• Row sums of triangle A131404.at n=13A131405
• a(n) is the smallest number k such that k^n has the same digits as some other n-th power without leading zeros.at n=19A133208
• Smallest multiple of n whose factorial digit sum equals n.at n=38A191895
• Numbers n such that Bernoulli number B_{n} has denominator 3318.at n=22A272383
• a(n) is the number of labeled rooted unordered binary trees T where the nodes are labeled with distinct positive integers, the root has label n, each parent label equals the sum of its children labels, and T cannot be extended.at n=32A348850