a(n) = A138906(n) - A138905(n).

Terms

a(0) =2a(1) =14a(2) =2a(3) =74a(4) =32a(5) =2a(6) =2a(7) =-94a(8) =-52a(9) =482a(10) =-262a(11) =578a(12) =2a(13) =590a(14) =452a(15) =386a(16) =-814a(17) =326a(18) =1598a(19) =1202a(20) =758a(21) =530a(22) =-1516a(23) =290a(24) =602a(25) =-154a(26) =-1618a(27) =2354a(28) =2612a(29) =1442