Smallest m > 0 such that the triangular number m*(m+1)/2 is divisible by 2^n-1.

Terms

a(0) =1a(1) =2a(2) =6a(3) =5a(4) =30a(5) =27a(6) =126a(7) =50a(8) =146a(9) =186a(10) =712a(11) =90a(12) =8190a(13) =2666a(14) =3472a(15) =6425a(16) =131070a(17) =37449a(18) =524286a(19) =95325a(20) =547624a(21) =700074a(22) =2677214a(23) =184365a(24) =540299a(25) =11180714a(26) =12870192a(27) =8956040a(28) =66682968a(29) =349866