-2071

Appears in sequences

• a(n) = -(n + 1)*(2*n^2 + n - 12)/6.at n=18A058372
• Triangular array T(n,k), read by rows: coefficients of strong divisibility sequence of polynomials p(1,x) = 1, p(2,x) = 1 + 3*x, p(n,x) = u*p(n-1,x) + v*p(n-2,x) for n >= 3, where u = p(2,x), v = 1 - 3*x - 2*x^2.at n=53A368155
• Numerators of the partial alternating sums of the reciprocals of the alternating sum of divisors function (A206369).at n=27A379621