Even and odd solutions to abs(sigma(x)-2x) <= log(x). Numbers n whose abundance-radius does not exceed log(n).
A088011
Even and odd solutions to abs(sigma(x)-2x) <= log(x). Numbers n whose abundance-radius does not exceed log(n).
Terms
- a(0) =4a(1) =6a(2) =8a(3) =10a(4) =16a(5) =20a(6) =28a(7) =32a(8) =64a(9) =70a(10) =88a(11) =104a(12) =110a(13) =128a(14) =136a(15) =152a(16) =256a(17) =464a(18) =496a(19) =512a(20) =592a(21) =650a(22) =884a(23) =1024a(24) =1155a(25) =1888a(26) =1952a(27) =2048a(28) =2144a(29) =4030
External references
- oeis: A088011