A117000(n) + A117001(n).

Terms

a(0) =1a(1) =0a(2) =-6a(3) =0a(4) =-10a(5) =-6a(6) =14a(7) =0a(8) =15a(9) =-10a(10) =-22a(11) =0a(12) =-26a(13) =14a(14) =20a(15) =0a(16) =34a(17) =18a(18) =-38a(19) =-10a(20) =-28a(21) =-22a(22) =46a(23) =0a(24) =45a(25) =-26a(26) =-36a(27) =14a(28) =-58a(29) =30