A309406 - OEIS

%I #14 Nov 16 2019 10:30:10

%S 1,3,7,9,13,15,31,33,37,51,73,99,111,115,151,339,393,511,777,933,9999,

%T 33333,55555,111111,777777,7777777,55555555

%N Absolute lucky numbers: every permutation of digits is a lucky number.

%C More terms are in A031882, as A031882 is a subset of this sequence.

%C No more terms below 10^9. - _Amiram Eldar_, Nov 16 2019

%e a(6) = 15 because 15 and 51 are lucky numbers.

%e a(14) = 115 because (115, 151, 511) are all lucky numbers.

%Y Cf. A000959, A118561, A031882, A003459.

%K base,nonn,more

%O 1,2

%A _Hauke Löffler_, Jul 29 2019

%E a(25)-a(27) from _Amiram Eldar_, Nov 16 2019