Ceiling(n*exp(-cot(n))).

Terms

a(0) =1a(1) =4a(2) =3341a(3) =2a(4) =7a(5) =187a(6) =3a(7) =10a(8) =83a(9) =3a(10) =12a(11) =58a(12) =2a(13) =13a(14) =49a(15) =1a(16) =13a(17) =44a(18) =1a(19) =13a(20) =41a(21) =1a(22) =13a(23) =39a(24) =44714a(25) =12a(26) =37a(27) =978a(28) =10a(29) =36