Sum of primes dividing the repunit numbers (with repetition).

Terms

a(0) =0a(1) =0a(2) =11a(3) =40a(4) =112a(5) =312a(6) =71a(7) =4888a(8) =322a(9) =333710a(10) =9414a(11) =534888a(12) =10073a(13) =265371785a(14) =913990a(15) =2906544a(16) =5882692a(17) =5365294080a(18) =386339a(20) =41017a(21) =10845593a(22) =547805a(24) =100000284a(25) =182521260315