Least k such that f(k) < 0, where f(1) = n and f(k) = f(k-1)*e^(1/k) - 1 for k > 1.

Terms

a(0) =2a(1) =3a(2) =7a(3) =14a(4) =27a(5) =53a(6) =103a(7) =199a(8) =383a(9) =738a(10) =1422a(11) =2739a(12) =5274a(13) =10156a(14) =19556a(15) =37657a(16) =72511a(17) =139625a(18) =268857a(19) =517702a(20) =996870a(21) =1919539a(22) =3696200a(23) =7117277a(24) =13704787a(25) =26389471a(26) =50814668a(27) =97846995a(28) =188410842a(29) =362797502