-6468

Appears in sequences

• Real part of Gaussian amicable numbers in order of increasing magnitude. See A102925 for the imaginary part.at n=12A102924
• Coefficients of mock modular form H_1^(2) of type 2A, divided by 2.at n=25A256059
• a(n) = Sum_{k=0..n} (-1)^(n - k) * binomial(n, k) * binomial(n + k - 1, n - k).at n=10A350290