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 A185024 #22 Jun 27 2019 03:02:40 %S A185024 2,3,4,5,7,8,9,11,12,13,14,16,17,18,19,22,23,24,25,26,27,29,30,31,32, %T A185024 33,34,37,38,39,40,41,42,43,44,46,47,48,49,50,51,52,53,54,57,58,59,60, %U A185024 61,62,63,64,65,67,68,69,71,72,73,74,75,76,77,79,80,81 %N A185024 Numbers occurring in just one row of Pascal's triangle. %H A185024 Reinhard Zumkeller, <a href="/A185024/b185024.txt">Table of n, a(n) for n = 1..2500</a> %H A185024 Wikipedia, <a href="http://en.wikipedia.org/wiki/Singmaster's_conjecture">Singmaster's conjecture</a> %H A185024 <a href="/index/Pas#Pascal">Index entries for triangles and arrays related to Pascal's triangle</a> %F A185024 A059233(a(n)) = 1. %F A185024 a(n) = A137905(n-1), n >= 2. - _Elijah Beregovsky_, May 14 2019 %o A185024 (Haskell) %o A185024 import Data.List (elemIndices) %o A185024 a185024 n = a185024_list !! (n-1) %o A185024 a185024_list = map (+ 2 ) $ elemIndices 1 a059233_list %Y A185024 Cf. A137905, A098565, A182237, A059233. %K A185024 nonn %O A185024 1,1 %A A185024 _Reinhard Zumkeller_, Dec 24 2012