|sin(n)| < |sin(n+1)|.

Terms

a(0) =0a(1) =1a(2) =3a(3) =4a(4) =6a(5) =7a(6) =9a(7) =10a(8) =13a(9) =16a(10) =19a(11) =22a(12) =23a(13) =25a(14) =26a(15) =28a(16) =29a(17) =31a(18) =32a(19) =35a(20) =38a(21) =41a(22) =44a(23) =45a(24) =47a(25) =48a(26) =50a(27) =51a(28) =53a(29) =54