a(n) = n + (n+1)^2 + (n+2)^3 + (n+3)^4.

Terms

a(0) =90a(1) =288a(2) =700a(3) =1440a(4) =2646a(5) =4480a(6) =7128a(7) =10800a(8) =15730a(9) =22176a(10) =30420a(11) =40768a(12) =53550a(13) =69120a(14) =87856a(15) =110160a(16) =136458a(17) =167200a(18) =202860a(19) =243936a(20) =290950a(21) =344448a(22) =405000a(23) =473200a(24) =549666a(25) =635040a(26) =729988a(27) =835200a(28) =951390a(29) =1079296