Least k such that Sum_{i=0..n} (-k)^i / i! is a positive integer.

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =4a(5) =30a(6) =6a(7) =28a(8) =120a(9) =84a(10) =210a(11) =1650a(12) =210a(13) =11440a(14) =6930a(15) =630a(16) =9240a(17) =353430a(18) =93450a(19) =746130a(20) =1616160a(21) =746130a(22) =1021020a(23) =11104170a(24) =56705880a(25) =9722790a(26) =48498450a(27) =174594420a(28) =87297210a(29) =222071850