a(n) = ceiling(tan(n)^2).

Terms

a(0) =0a(1) =3a(2) =5a(3) =1a(4) =2a(5) =12a(6) =1a(7) =1a(8) =47a(9) =1a(10) =1a(11) =51054a(12) =1a(13) =1a(14) =53a(15) =1a(16) =1a(17) =13a(18) =2a(19) =1a(20) =6a(21) =3a(22) =1a(23) =3a(24) =5a(25) =1a(26) =2a(27) =11a(28) =1a(29) =1