28536

Appears in sequences

• Number of partitions of n into prime power parts (1 included); number of nonisomorphic Abelian subgroups of symmetric group S_n.at n=45A023893
• 1 / min{1/n - 1/a - 1/b > 0}, where a and b are integers.at n=23A045470
• Number of rooted identity trees with n nodes and 6 leaves.at n=6A055331
• a(n) = n*Pell(n-2).at n=12A093969
• Largest denominator used in the Egyptian fraction representation of n/(n + 1) by the greedy algorithm.at n=39A100695
• Triangle read by rows: T(n,k) is the number of hill-free Schroeder paths of length 2n that have k horizontal steps on the x-axis (0<=k<=n). A Schroeder path of length 2n is a lattice path from (0,0) to (2n,0) consisting of U=(1,1), D=(1,-1) and H=(2,0) steps and never going below the x-axis. A hill is a peak at height 1.at n=46A114709
• Symmetric triangle, read by rows of 2*n+1 terms, similar to triangle A008301. Second term 4 times first term.at n=20A126150
• Main diagonal of symmetric triangle A126150: a(n) = A126150(n,n).at n=4A126152
• Nonnegative values x of solutions (x, y) to the Diophantine equation x^2 + (x + 41)^2 = y^2.at n=12A129288
• Number of (w,x,y) with all terms in {0,...,n} and w != x and x > range(w,x,y).at n=37A212969
• Indices of 0 in A348295: numbers m such that Sum_{k=1..m} (-1)^(floor(k*(sqrt(2)-1))) = Sum_{k=1..m} (-1)^A097508(k) = 0.at n=40A348299