27626

Appears in sequences

• Sum of the first moments of all partitions of n with weight starting at 1.at n=19A066184
• Numbers k such that there is a number m < k satisfying A000203(k) = A000203(m) = m + k - gcd(m,k).at n=35A124141
• Number of acute isosceles triangles on a centered hexagonal grid of size n.at n=7A241229
• T(n,k)=Number of nXk arrays containing k copies of 0..n-1 with no element 1 greater than its north, west, southeast or southwest neighbor modulo n and the upper left element equal to 0.at n=39A266632
• Number of 4Xn arrays containing n copies of 0..4-1 with no element 1 greater than its north, west, southeast or southwest neighbor modulo 4 and the upper left element equal to 0.at n=5A266633
• Regular triangle read by rows where T(n,k) is the number of k-uniform hypergraphs spanning n labeled vertices where every two vertices appear together in some edge, n >= 0, 0 <= k <= n.at n=25A320606
• Irregular table read by rows: T(n,k) is the number of k-gons, k>=3, formed inside a right triangle by the straight line segments mutually connecting all vertices and points on the two shorter edges whose positions equal the Farey series of order n.at n=21A359971