Partial sums of A000594.

Terms

a(0) =1a(1) =-23a(2) =229a(3) =-1243a(4) =3587a(5) =-2461a(6) =-19205a(7) =65275a(8) =-48368a(9) =-164288a(10) =370324a(11) =-620a(12) =-578358a(13) =-176502a(14) =1040658a(15) =2027794a(16) =-4878140a(17) =-2150708a(18) =8510712a(19) =1400952a(20) =-2818536a(21) =-15649224a(22) =2994048a(23) =24283008a(24) =-1216217a(25) =12649495a(26) =-60629585a(27) =-35982417a(28) =92424213a(29) =63212373