n such that 3 < sigma(n)/n < sigma(m)/m for all abundant numbers m<n such that 3 < sigma(m)/m.
A259312
n such that 3 < sigma(n)/n < sigma(m)/m for all abundant numbers m<n such that 3 < sigma(m)/m.
Terms
- a(0) =180a(1) =780a(2) =1872a(3) =2352a(4) =16830a(5) =17850a(6) =20496a(7) =51060a(8) =59724a(9) =64890a(10) =430272a(11) =884730a(12) =3767100a(13) =4946508a(14) =15287976a(15) =33806052a(16) =34747416a(17) =40974318a(18) =137168580a(19) =140492772a(20) =157048290a(21) =184773312a(22) =3615557148a(23) =16709332608a(24) =40564903620a(25) =40936559976a(26) =60782804964
External references
- oeis: A259312