A039543 - OEIS

%I #12 Jul 01 2021 00:02:04

%S 71,137,215,281,359,425,503,569,647,713,731,743,755,767,779,803,815,

%T 827,839,851,852,853,854,855,856,858,859,860,861,862,935,1001,1079,

%U 1145,1223,1289,1367,1433,1511,1577,1589,1601,1613,1625,1637,1644

%N Numbers whose base-12 representation has the same nonzero number of 5's and 11's.

%t Select[Range[2000],DigitCount[#,12,5]==DigitCount[#,12,11]>0&] (* _Harvey P. Dale_, Oct 06 2020 *)

%K nonn,base,easy

%O 1,1

%A _Olivier Gérard_