Numerators of Euler twin numbers Et(n).

Terms

a(0) =1a(1) =-1a(2) =-1a(3) =-1a(4) =1a(5) =1a(6) =-1a(7) =-17a(8) =17a(9) =31a(10) =-31a(11) =-691a(12) =691a(13) =5461a(14) =-5461a(15) =-929569a(16) =929569a(17) =3202291a(18) =-3202291a(19) =-221930581a(20) =221930581a(21) =4722116521a(22) =-4722116521a(23) =-968383680827a(24) =968383680827