25740

Appears in sequences

• Coefficients of Legendre polynomials.at n=7A001800
• a(n) = LCM(1,2,...,n) / n.at n=13A002944
• Coordination sequence for A_4 lattice.at n=13A008383
• Expansion of (1-4*x)^(15/2).at n=17A020927
• Denominator of n * n-th harmonic number.at n=13A027611
• Twice central binomial coefficients.at n=8A028329
• Expansion of 1/(2*x) * (1/(1-4*x)^(3/2)-1).at n=6A033876
• Molien series for 3-D group R4.at n=20A037243
• Number of 2n-bead balanced binary necklaces which are equivalent to their complement, but not equivalent to their reverse and their reversed complement.at n=20A045677
• a(n) = Sum_{j=0..n} A047072(j, n-j).at n=17A047073
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/6 of the elements are <= (n-2)/2.at n=22A047191
• Partial sums of A050494.at n=8A053367
• Triangle giving numbers of closed plane meanders.at n=42A060972
• Triangle giving numbers of closed plane meanders.at n=38A060972
• Number of n-step walks on a line starting from the origin but not returning to it.at n=17A063886
• Triangle read by rows: T(n,k) is the number of walks (each step +-1) of length 2n which have a cumulative value of 0 last at step 2k.at n=46A067804
• Numbers of the form (2i)! (2j)! / i! j! (i + j)!.at n=46A068514
• Duplicate of A027611.at n=13A075711
• Duplicate of A027611.at n=13A079077
• Triangle T(n,k) read by rows; related to number of preorders.at n=32A079502