18086

Appears in sequences

• Numbers k such that 175*2^k+1 is prime.at n=24A032464
• Number of nondecreasing integer sequences of length 21 with sum zero and sum of absolute values 2n.at n=13A158155
• Cyclops numbers whose squares are cyclops numbers.at n=33A239827
• Sum of the third largest parts of the partitions of 4n into 4 parts.at n=15A242727
• a(n) = prime(n)*prime(n+1) + prime(n+2).at n=31A292926
• Array read by antidiagonals: T(n,k) = number of noncrossing path sets on k*n nodes up to rotation and reflection with each path having exactly k nodes.at n=32A302828
• Number of noncrossing path sets on 4*n nodes up to rotation and reflection with each path having exactly 4 nodes.at n=4A303867
• Row sums of A325433.at n=41A325434
• a(n) = Sum_{k=0..n} phi(k^2 + 1), where phi is the Euler totient function (A000010).at n=43A333170
• Number of edge-weighted n-regular multigraphs on 2 unlabeled vertices with total edge weight n.at n=13A390166