Numerator of Euler(n,5).

Terms

a(0) =1a(1) =9a(2) =20a(3) =351a(4) =380a(5) =3249a(6) =6860a(7) =229167a(8) =118460a(9) =971919a(10) =1981100a(11) =32152941a(12) =32499740a(13) =262096389a(14) =527337740a(15) =33900692319a(16) =8503972220a(17) =68206642659a(18) =136664636780