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 A166713 #2 Mar 30 2012 17:36:45 %S A166713 11,22,23,32,33,44,45,54,55,66,67,76,77,88,99,111,222,223,232,233,322, %T A166713 323,332,333,444,445,454,455,544,545,554,555,666,667,676,677,766,767, %U A166713 776,777,888,999,1111,2222,2223,2232,2233,2322,2323,2332,2333,3222,3223 %N A166713 Alliterative-digit numbers: Positive integers n such that the English names of the decimal digits of n begin with the same letter; ignore single-digit numbers. %C A166713 The multi-digit repdigits (A014181) are a subsequence. No term contains the digit 0 (zero). All terms containing digits 1 (one), 8 (eight), or 9 (nine) are also terms of A014181. Any term not mentioned above is a string of 2's (twos) and 3's (threes) only (a multi-digit term of A032810), 4's (fours) and 5's (fives) only, or 6's (sixes) and 7's (sevens) only. %e A166713 454 is a term as digits "four", "five", "four" each begin with the letter "f". %Y A166713 Cf. A146755, A014181, A032810. %K A166713 base,easy,nonn,word %O A166713 1,1 %A A166713 _Rick L. Shepherd_, Oct 19 2009