Numbers k whose abundance-radius does not exceed log(log(k)), i.e., abs(sigma(k)-2*k) <= log(log(k)).

A088818

Numbers k whose abundance-radius does not exceed log(log(k)), i.e., abs(sigma(k)-2*k) <= log(log(k)).

Terms

    a(0) =6a(1) =16a(2) =28a(3) =32a(4) =64a(5) =128a(6) =256a(7) =496a(8) =512a(9) =1024a(10) =1952a(11) =2048a(12) =4096a(13) =8128a(14) =8192a(15) =16384a(16) =32768a(17) =32896a(18) =65536a(19) =130304a(20) =131072a(21) =262144a(22) =522752a(23) =524288a(24) =1048576a(25) =2097152a(26) =4194304a(27) =8382464a(28) =8388608a(29) =16777216

External references