a(n)= Sum_{j=0..floor(n/2)} A073145(2*j + q), where q = 2*(n/2 - floor(n/2)).

Terms

a(0) =3a(1) =-1a(2) =2a(3) =4a(4) =-3a(5) =3a(6) =8a(7) =-12a(8) =11a(9) =11a(10) =-30a(11) =32a(12) =13a(13) =-73a(14) =96a(15) =-8a(16) =-157a(17) =263a(18) =-110a(19) =-308a(20) =685a(21) =-485a(22) =-504a(23) =1676a(24) =-1653a(25) =-525a(26) =3858a(27) =-4984a(28) =605a(29) =8239