Numerator of Sum_{k=1..n} 1/sigma(k).

Terms

a(0) =1a(1) =4a(2) =19a(3) =145a(4) =53a(5) =83a(6) =353a(7) =607a(8) =8171a(9) =75359a(10) =78089a(11) =79259a(12) =11657a(13) =2963a(14) =12047a(15) =378137a(16) =386197a(17) =389917a(18) =397171a(19) =2804377a(20) =11344453a(21) =11457293a(22) =11626553a(23) =11694257a(24) =11825297a(25) =11922017a(26) =12023573a(27) =12096113a(28) =12231521a(29) =12287941