a(0) = 1, a(n) = 28*n^2 + 2 for n>0.

Terms

a(0) =1a(1) =30a(2) =114a(3) =254a(4) =450a(5) =702a(6) =1010a(7) =1374a(8) =1794a(9) =2270a(10) =2802a(11) =3390a(12) =4034a(13) =4734a(14) =5490a(15) =6302a(16) =7170a(17) =8094a(18) =9074a(19) =10110a(20) =11202a(21) =12350a(22) =13554a(23) =14814a(24) =16130a(25) =17502a(26) =18930a(27) =20414a(28) =21954a(29) =23550