50k^2-40k-17 interleaved with 50k^2+10k+13 for k=>0.

Terms

a(0) =-17a(1) =13a(2) =-7a(3) =73a(4) =103a(5) =233a(6) =313a(7) =493a(8) =623a(9) =853a(10) =1033a(11) =1313a(12) =1543a(13) =1873a(14) =2153a(15) =2533a(16) =2863a(17) =3293a(18) =3673a(19) =4153a(20) =4583a(21) =5113a(22) =5593a(23) =6173a(24) =6703a(25) =7333a(26) =7913a(27) =8593a(28) =9223a(29) =9953