G.f.: Re((i*x; x)_inf), where (a; q)_inf is the q-Pochhammer symbol, i = sqrt(-1).

Terms

a(0) =1a(1) =0a(2) =0a(3) =-1a(4) =-1a(5) =-2a(6) =-2a(7) =-3a(8) =-3a(9) =-4a(10) =-3a(11) =-4a(12) =-3a(13) =-3a(14) =-1a(15) =-1a(16) =2a(17) =3a(18) =7a(19) =9a(20) =14a(21) =16a(22) =23a(23) =26a(24) =33a(25) =37a(26) =45a(27) =48a(28) =57a(29) =60