a(n) = (44^n - 1)/43.A218747a(n) = (44^n - 1)/43.Terms a(0) =0a(1) =1a(2) =45a(3) =1981a(4) =87165a(5) =3835261a(6) =168751485a(7) =7425065341a(8) =326702875005External referencesoeis: A218747