Numbers k whose sum of divisors equals the sum of divisors of 2*k-1.

Terms

a(0) =1a(1) =6a(2) =348a(3) =496a(4) =1420a(5) =1854a(6) =4674a(7) =5352a(8) =6424a(9) =13545a(10) =21126a(11) =28210a(12) =37336a(13) =57645a(14) =84370a(15) =95526a(16) =109648a(17) =116865a(18) =140056a(19) =150366a(20) =163450a(21) =176826a(22) =215430a(23) =305900a(24) =321496a(25) =330858a(26) =517914a(27) =558304a(28) =590790a(29) =617260