a(n) is the greatest positive integer k such that lambda(k) <= n where lambda is the Carmichael lambda function (A002322).
A258781
a(n) is the greatest positive integer k such that lambda(k) <= n where lambda is the Carmichael lambda function (A002322).
Terms
- a(0) =2a(1) =24a(2) =24a(3) =240a(4) =240a(5) =504a(6) =504a(7) =504a(8) =504a(9) =504a(10) =504a(11) =65520a(12) =65520a(13) =65520a(14) =65520a(15) =65520a(16) =65520a(17) =65520a(18) =65520a(19) =65520a(20) =65520a(21) =65520a(22) =65520a(23) =131040a(24) =131040a(25) =131040a(26) =131040a(27) =131040a(28) =131040a(29) =171864
External references
- oeis: A258781