Odd numbers n such that abs(sigma(n)-2n) <= n^(1/3). Abundance-radius = abs(sigma(n)-2n) does not exceed cubic root of n and n is odd.
A088010
Odd numbers n such that abs(sigma(n)-2n) <= n^(1/3). Abundance-radius = abs(sigma(n)-2n) does not exceed cubic root of n and n is odd.
Terms
- a(0) =1a(1) =315a(2) =1155a(3) =8415a(4) =8925a(5) =31815a(6) =32445a(7) =33705a(8) =34335a(9) =78975a(10) =351351a(11) =430815a(12) =437745a(13) =442365a(14) =449295a(15) =730125a(16) =1805475a(17) =7667625a(18) =13800465a(19) =14571585a(20) =16029405a(21) =16286445a(22) =20297745a(23) =20355825a(24) =20487159a(25) =21003885a(26) =22982505a(27) =23082885
External references
- oeis: A088010