Numerators of expansion of exp x / sin x.

Terms

a(0) =1a(1) =2a(2) =1a(3) =13a(4) =1a(5) =19a(6) =13a(7) =29a(8) =17a(9) =13a(10) =97a(11) =254983a(12) =1247a(13) =2593a(14) =4937a(15) =137561a(16) =6673a(17) =65082637a(18) =1058467a(19) =7254146201a(20) =1380290071a(21) =390121079a(22) =3216636877a(24) =536799743a(25) =109336409527