a(n) = A137576((N-1)/2) - N, where N = A001567(n).

Terms

a(0) =30a(1) =320a(2) =224a(3) =240a(4) =72a(5) =360a(6) =728a(7) =0a(8) =672a(9) =216a(10) =1320a(11) =0a(12) =0a(13) =16a(14) =5060a(15) =60a(16) =126a(17) =10560a(18) =216a(19) =0a(20) =3360a(21) =2574a(22) =150a(23) =5040a(24) =2808a(25) =3600a(26) =3600a(27) =232a(28) =400a(29) =420