Values of Zagier's function J_1(k) as k runs through the numbers -1, 0, 3, 4, 7, 8, ... which are == -1 or 0 mod 4.

A027653

Values of Zagier's function J_1(k) as k runs through the numbers -1, 0, 3, 4, 7, 8, ... which are == -1 or 0 mod 4.

Terms

    a(0) =-1a(1) =2a(2) =-248a(3) =492a(4) =-4119a(5) =7256a(6) =-33512a(7) =53008a(8) =-192513a(9) =287244a(10) =-885480a(11) =1262512a(12) =-3493982a(13) =4833456a(14) =-12288992a(15) =16576512a(16) =-39493539a(17) =52255768a(18) =-117966288a(19) =153541020a(20) =-331534572a(21) =425691312a(22) =-884736744a(23) =1122626864a(24) =-2257837845a(25) =2835861520a(26) =-5541103056a(27) =6896878512

External references