Numbers of the form n(n+1)/2 whose only representation as a sum of 2 or more consecutive positive integers is 1+2+...+n.

A068195

Numbers of the form n(n+1)/2 whose only representation as a sum of 2 or more consecutive positive integers is 1+2+...+n.

Terms

    a(0) =1a(1) =3a(2) =6a(3) =10a(4) =28a(5) =136a(6) =496a(7) =8128a(8) =32896a(9) =33550336a(10) =2147516416a(11) =8589869056a(12) =137438691328

External references