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

Terms

a(0) =1a(1) =8a(2) =25a(3) =58a(4) =113a(5) =196a(6) =313a(7) =470a(8) =673a(9) =928a(10) =1241a(11) =1618a(12) =2065a(13) =2588a(14) =3193a(15) =3886a(16) =4673a(17) =5560a(18) =6553a(19) =7658a(20) =8881a(21) =10228a(22) =11705a(23) =13318a(24) =15073a(25) =16976a(26) =19033a(27) =21250a(28) =23633a(29) =26188