a(n) = n^5*(n^10 + 1)/2.A168507a(n) = n^5*(n^10 + 1)/2.Terms a(0) =0a(1) =1a(2) =16400a(3) =7174575a(4) =536871424a(5) =15258790625a(6) =235092496176External referencesoeis: A168507