Numbers of the form A001317(t), excluding those at places of the form t=m*(2^k-1), m>=0, k>=2.

A177960

Numbers of the form A001317(t), excluding those at places of the form t=m*(2^k-1), m>=0, k>=2.

Terms

    a(0) =3a(1) =5a(2) =17a(3) =51a(4) =257a(5) =1285a(6) =3855a(7) =13107a(8) =65537a(9) =196611a(10) =983055a(11) =1114129a(12) =5570645a(13) =16711935a(14) =50529027a(15) =84215045a(16) =858993459a(17) =4294967297a(18) =21474836485a(19) =219043332147a(20) =365072220245

External references