Numbers n such that the products n*(sum of the reciprocals of the Collatz (3x+1) sequence beginning at n) are integers.

A225878

Numbers n such that the products n*(sum of the reciprocals of the Collatz (3x+1) sequence beginning at n) are integers.

Terms

    a(0) =1a(1) =2a(2) =4a(3) =8a(4) =16a(5) =32a(6) =64a(7) =80a(8) =128a(9) =160a(10) =208a(11) =256a(12) =320a(13) =416a(14) =512a(15) =640a(16) =832a(17) =1024a(18) =1280a(19) =1344a(20) =1664a(21) =2048a(22) =2560a(23) =2688a(24) =3328a(25) =4096a(26) =5120a(27) =5376a(28) =6656a(29) =8192

External references