a(n) = (1/4)*n^4 - (1/2)*n^3 + (3/4)*n^2 - (1/2)*n + 41.

Terms

a(0) =41a(1) =43a(2) =53a(3) =83a(4) =151a(5) =281a(6) =503a(7) =853a(8) =1373a(9) =2111a(10) =3121a(11) =4463a(12) =6203a(13) =8413a(14) =11171a(15) =14561a(16) =18673a(17) =23603a(18) =29453a(19) =36331a(20) =44351a(21) =53633a(22) =64303a(23) =76493a(24) =90341a(25) =105991a(26) =123593a(27) =143303a(28) =165283a(29) =189701