a(n) = ceiling(n*exp(csc(n))).

Terms

a(0) =4a(1) =7a(2) =3586a(3) =2a(4) =2a(5) =1a(6) =33a(7) =22a(8) =102a(9) =2a(10) =5a(11) =2a(12) =141a(13) =39a(14) =70a(15) =1a(16) =7a(17) =5a(18) =15012a(19) =60a(20) =70a(21) =1a(22) =8a(23) =8a(24) =1a(25) =97a(26) =77a(27) =1123a(28) =7a(29) =11