Zagier's function -J_1(4*n-1).

Terms

a(0) =1a(1) =248a(2) =4119a(3) =33512a(4) =192513a(5) =885480a(6) =3493982a(7) =12288992a(8) =39493539a(9) =117966288a(10) =331534572a(11) =884736744a(12) =2257837845a(13) =5541103056a(14) =13136687601a(15) =30197680312a(16) =67515206970a(17) =147197952744a(18) =313645814923a(19) =654403831496