Let H_n=1+ 12+ 13+ + 1n, then the sum to n terms of the series 1^2 1^3 + 1^2+2^2 1^3+2^3 + 1^2+2^2+3^2...

Question

Let H_n=1+ 12+ 13+ + 1n, then the sum to n terms of the series 1^2 1^3 + 1^2+2^2 1^3+2^3 + 1^2+2^2+3^2 1^3+2^3+3^3 + , is

Accepted Answer

(D)

JEE Main Mathematics question