A007318 * A129360.

Terms

a(0) =1a(1) =1a(2) =1a(3) =0a(4) =2a(5) =1a(6) =-2a(7) =3a(8) =3a(9) =1a(10) =-6a(11) =4a(12) =6a(13) =4a(14) =1a(15) =-14a(16) =4a(17) =10a(18) =10a(19) =5a(20) =1a(21) =-30a(22) =0a(23) =15a(24) =20a(25) =15a(26) =6a(27) =1a(28) =-62a(29) =-14