Least k such that Sum_{i=n..k} 1/i >= n.

Terms

a(0) =1a(1) =11a(2) =51a(3) =192a(4) =669a(5) =2222a(6) =7135a(7) =22374a(8) =68916a(9) =209348a(10) =628916a(11) =1872269a(12) =5531641a(13) =16238866a(14) =47410139a(15) =137758585a(16) =398617683a(17) =1149205715a(18) =3302324374a(19) =9461757569a(20) =27038402095a(21) =77082571383a(22) =219276117983a(23) =622541323482