Minimum positive numerator of s_1/1 + ... + s_n/n in lowest terms, where each s_i equals 1 or -1.

Terms

a(0) =1a(1) =1a(2) =1a(3) =1a(4) =7a(5) =1a(6) =11a(7) =9a(8) =11a(9) =11a(10) =23a(11) =23a(12) =607a(13) =251a(14) =59a(15) =25a(16) =97a(17) =97a(18) =2647a(19) =2647a(20) =1337a(21) =457a(22) =8917a(23) =8917a(24) =7951a(25) =4261a(26) =12439a(27) =12439a(28) =587971a(29) =587971