a(1) = 1. a(n) = sum of the earlier terms of the sequence, a(k), where GCD(n,a(k)) is <= k, for 1 <= k <= n-1.

A119990

a(1) = 1. a(n) = sum of the earlier terms of the sequence, a(k), where GCD(n,a(k)) is <= k, for 1 <= k <= n-1.

Terms

    a(0) =1a(1) =1a(2) =2a(3) =4a(4) =8a(5) =16a(6) =32a(7) =8a(8) =72a(9) =144a(10) =288a(11) =72a(12) =648a(13) =1296a(14) =2592a(15) =808a(16) =5992a(17) =6872a(18) =18856a(19) =37712a(20) =75424a(21) =150848a(22) =301696a(23) =598224a(24) =1201616a(25) =1201616a(26) =3600312a(27) =7199168a(28) =14404328a(29) =28808656

External references