a(n) = numerator(Sum_{k=1..n} 1/k!).

Terms

a(0) =1a(1) =3a(2) =5a(3) =41a(4) =103a(5) =1237a(6) =433a(7) =69281a(8) =62353a(9) =6235301a(10) =8573539a(11) =164611949a(12) =5349888343a(13) =29959374721a(14) =561738276019