78033

Appears in sequences

• Partial sums of n 3-spaced triangular numbers beginning with t(2), e.g., a(2) = t(2) + t(5) = 3 + 15 = 18.at n=36A085789
• Vassiliev invariant of fourth order for the torus knots.at n=18A180324
• a(n) = n^2*(n*(4*n + 3) + 3*n*(-1)^n - 4)/96.at n=36A302758