a(n) = Sum_{k=1..n} [ 1/{k*Pi} ], where {x} := x - [ x ].

Terms

a(0) =7a(1) =10a(2) =12a(3) =13a(4) =14a(5) =15a(6) =16a(7) =23a(8) =26a(9) =28a(10) =29a(11) =30a(12) =31a(13) =32a(14) =40a(15) =43a(16) =45a(17) =46a(18) =47a(19) =48a(20) =49a(21) =57a(22) =60a(23) =62a(24) =63a(25) =64a(26) =65a(27) =66a(28) =75a(29) =79