a(0) = 1, a(n) = 19*n^2 + 2 for n>0.

Terms

a(0) =1a(1) =21a(2) =78a(3) =173a(4) =306a(5) =477a(6) =686a(7) =933a(8) =1218a(9) =1541a(10) =1902a(11) =2301a(12) =2738a(13) =3213a(14) =3726a(15) =4277a(16) =4866a(17) =5493a(18) =6158a(19) =6861a(20) =7602a(21) =8381a(22) =9198a(23) =10053a(24) =10946a(25) =11877a(26) =12846a(27) =13853a(28) =14898a(29) =15981