Numerators of Van der Pol numbers.

Terms

a(0) =1a(1) =-1a(2) =1a(3) =-1a(4) =-1a(5) =1a(6) =1a(7) =-1a(8) =-37a(9) =111a(10) =177a(11) =-177a(12) =-2753a(13) =2753a(14) =827a(15) =-827a(16) =-8386459a(17) =8386459a(18) =28033727a(19) =-28033727a(20) =-14529522883a(21) =14529522883a(22) =1799010587a(23) =-1799010587a(24) =-47497385017a(25) =47497385017