36660

Appears in sequences

• Number of 5-tuples of different integers from [ 1,n ] with no common factors among pairs.at n=40A015698
• Number of different Euler multigraphs with n edges, loops allowed.at n=11A068590
• G.f. A(x) satisfies: A(x) = x/f(x,A(x)) where f(,) is Ramanujan's theta function; i.e., A(x) = x/Sum_{n=-oo,+oo} x^(n*(n+1)/2)*A(x)^(n*(n-1)/2).at n=8A107944
• a(n) = A130179(n)/81.at n=28A130085
• Triangle read by rows, s_4(n, k) where s_m(n, k) are the Stirling-Frobenius cycle numbers of order m; n >= 0, k >= 0.at n=24A225471
• a(n) = 54*n^2 + 6*n.at n=26A277990
• Product of primes indexed by the prime exponents of n!.at n=16A325508
• Perimeters of more than one primitive 120-degree integer triangle.at n=29A350047
• Coefficient of x^3 in expansion of (x+3) * (x+7) * ... * (x+4*n-1).at n=6A383703