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

Terms

a(0) =0a(1) =3a(2) =26a(3) =111a(4) =324a(5) =755a(6) =1518a(7) =2751a(8) =4616a(9) =7299a(10) =11010a(11) =15983a(12) =22476a(13) =30771a(14) =41174a(15) =54015a(16) =69648a(17) =88451a(18) =110826a(19) =137199a(20) =168020a(21) =203763a(22) =244926a(23) =292031a(24) =345624a(25) =406275a(26) =474578a(27) =551151a(28) =636636a(29) =731699