a(n) = n*(n + 5)*(n + 7)/6 + 1.

Terms

a(0) =1a(1) =9a(2) =22a(3) =41a(4) =67a(5) =101a(6) =144a(7) =197a(8) =261a(9) =337a(10) =426a(11) =529a(12) =647a(13) =781a(14) =932a(15) =1101a(16) =1289a(17) =1497a(18) =1726a(19) =1977a(20) =2251a(21) =2549a(22) =2872a(23) =3221a(24) =3597a(25) =4001a(26) =4434a(27) =4897a(28) =5391a(29) =5917