First term of n-th difference sequence of round((k*Pi)), k >= 0.

Terms

a(0) =3a(1) =0a(2) =0a(3) =1a(4) =-4a(5) =10a(6) =-20a(7) =35a(8) =-56a(9) =84a(10) =-119a(11) =154a(12) =-154a(13) =0a(14) =637a(15) =-2548a(16) =7448a(17) =-18767a(18) =42924a(19) =-91238a(20) =182476a(21) =-345401a(22) =618772a(23) =-1041348a(24) =1613129a(25) =-2184910a(26) =2184910a(27) =0a(28) =-8333871a(29) =31750824