Inverse Moebius transform of triangular numbers.

Terms

a(0) =1a(1) =4a(2) =7a(3) =14a(4) =16a(5) =31a(6) =29a(7) =50a(8) =52a(9) =74a(10) =67a(11) =119a(12) =92a(13) =137a(14) =142a(15) =186a(16) =154a(17) =247a(18) =191a(19) =294a(20) =266a(21) =323a(22) =277a(23) =455a(24) =341a(25) =446a(26) =430a(27) =553a(28) =436a(29) =686