This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A031947 #17 Aug 24 2023 12:10:50 %S A031947 8345,8350,8375,8385,8410,8415,8525,8530,8585,8600,8620,8630,8735, %T A031947 8745,8765,8780,8835,8840,8950,8955,8980,8990,9015,9020,10505,10510, %U A031947 10535,10545,10570,10575,11045,11050,11165,11190,11200,11220,11255,11265,11345,11370,11415 %N A031947 Numbers in which 0,1,2,3,4,5 all occur in base 6. %C A031947 Contains numbers like 47265, 47290, 47295, 47405 which are absent in A049357. - _R. J. Mathar_, Aug 24 2023 %p A031947 isA031947 := proc(n) %p A031947 convert(convert(n,base,6),set) ; %p A031947 if nops(%) = 6 then %p A031947 true; %p A031947 else %p A031947 false; %p A031947 end if; %p A031947 end proc: %p A031947 for n from 1 to 12000 do %p A031947 if isA031947(n) then %p A031947 print(n); %p A031947 end if; %p A031947 end do: # _R. J. Mathar_, Aug 24 2023 %Y A031947 Cf. A007092 (base 6), A023744 (each base 6 digit once). %K A031947 nonn,base %O A031947 1,1 %A A031947 _Clark Kimberling_