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 A244008 #11 Aug 18 2022 09:47:45
%S A244008 0,1,2,4,5,6,8,16,25,26,46,48,52,60,61,62,64,84
%N A244008 Nonnegative integers with no repeated letters in their combined English decimal digit names.
%e A244008 The first multi-digit term is 16 since "one" and "six" taken together contain no duplicate letters. Although "one" itself contains no duplicate letters, by definition 11 is not a term since duplicate digits introduce repeated letters.
%o A244008 (Python)
%o A244008 m = ["zero", "one", "two", "three", "four", "five", "six", "seven", "eight", "nine"]
%o A244008 def nr(w): return len(w) == len(set(w))
%o A244008 afull = [k for k in range(988) if nr("".join(m[int(d)] for d in str(k)))]
%o A244008 print(afull) # _Michael S. Branicky_, Aug 18 2022
%o A244008 (PARI) is(n)=my(d=apply(k->[25,9,40,64,26,7,4,64,37,64][k+1], digits(n)),t); for(i=1,#d, if(bitand(t,d[i]), return(0)); t=bitor(t,d[i])); t<64 \\ _Charles R Greathouse IV_, Aug 18 2022
%Y A244008 Subsequence of A010784, A052405, A052419, and A007095.
%Y A244008 Cf. A059916.
%K A244008 nonn,word,base,fini,full,easy
%O A244008 1,3
%A A244008 _Rick L. Shepherd_, Jun 17 2014