Numbers k such that the odd part of (1+k) divides (1 + odd part of A034448(k)), where A034448 is unitary sigma (usigma).

A387418

Numbers k such that the odd part of (1+k) divides (1 + odd part of A034448(k)), where A034448 is unitary sigma (usigma).

Terms

    a(0) =1a(1) =3a(2) =7a(3) =15a(4) =31a(5) =63a(6) =127a(7) =255a(8) =511a(9) =1023a(10) =1791a(11) =2047a(12) =2431a(13) =4095a(14) =8191a(15) =14335a(16) =14847a(17) =16383a(18) =27391a(19) =32767a(20) =44031a(21) =57855a(22) =65535a(23) =114687a(24) =131071a(25) =204799a(26) =262143a(27) =376831a(28) =524287a(29) =923647

External references