184736

Appears in sequences

• Expansion of g.f. (x^3 - 6*x^2 + 5*x - 1)/((2*x - 1)*(2*x^2 - 4*x + 1)).at n=12A024175
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/4 of the elements are <= (n-1)/3.at n=20A048008
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/4 of the elements are <= (n-2)/3.at n=20A048019
• Number of nonempty subsets of {1,2,...,n} in which exactly 1/4 of the elements are <= (n-3)/3.at n=20A048030
• Let M = {{0, -1, 2}, {-1, 2, -1}, {2, -1, 0}}; v[1] = {0, 0, 1}; v[n] = M.v[n - 1]; then a(n) = v[n][[1]].at n=11A124026
• a(n) = Sum_{j = 1..n} Sum_{i = 1..n} (i + j)! / (i! * j!).at n=9A144657
• a(n) = Sum_{k=0..floor(n/2)} (C(n+2, k+2) - C(n+2, k)).at n=17A194124
• s(k)-s(j), where (s(k),s(j)) is the least pair of central binomial coefficients for which n divides their difference.at n=45A205014