a(n) is the smallest multiple k of 2^n such that |sigma(k) - 2*k| = 2^n, where sigma = A000203.
A363285
a(n) is the smallest multiple k of 2^n such that |sigma(k) - 2*k| = 2^n, where sigma = A000203.
Terms
- a(0) =1a(1) =10a(2) =12a(3) =56a(4) =752a(5) =992a(6) =12224a(7) =16256a(8) =654848a(9) =7337984a(10) =10483712a(11) =12580864a(12) =167763968a(13) =67100672a(14) =2684321792a(15) =38654574592a(16) =584115027968a(17) =17179738112a(18) =206158168064a(19) =274877382656
External references
- oeis: A363285