Numbers k such that each of k and k+1 is either a practical number (A005153) or an almost practical number (A174533).
A387654
Numbers k such that each of k and k+1 is either a practical number (A005153) or an almost practical number (A174533).
Terms
- a(0) =1a(1) =4095a(2) =5775a(3) =5984a(4) =11024a(5) =21735a(6) =21944a(7) =26144a(8) =39375a(9) =49664a(10) =58695a(11) =61424a(12) =69615a(13) =76544a(14) =79695a(15) =89775a(16) =91664a(17) =98175a(18) =104895a(19) =106784a(20) =111824a(21) =116655a(22) =116864a(23) =121904a(24) =134504a(25) =135135a(26) =144584a(27) =152775a(28) =155295a(29) =160544
External references
- oeis: A387654