a(n) = floor(n*exp(-sec(n))).

Terms

a(0) =0a(1) =22a(2) =8a(3) =18a(4) =0a(5) =2a(6) =1a(7) =7725a(8) =26a(9) =32a(10) =0a(11) =3a(12) =4a(13) =0a(14) =55a(15) =45a(16) =643a(17) =3a(18) =6a(19) =1a(20) =130a(21) =59a(22) =150a(23) =2a(24) =9a(25) =5a(26) =827a(27) =79a(28) =110a(29) =0