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 A029636 #17 Mar 02 2020 07:27:15 %S A029636 2,1,3,4,5,9,7,6,14,16,20,30,25,11,8,27,50,55,36,13,35,77,105,91,49, %T A029636 15,10,44,112,182,196,140,64,17,54,156,294,378,336,204,81,19,12,65, %U A029636 210,450,672,714,540,285,100,21,275,660,1122,1386,1254,825,385,121,23,90,352,935 %N A029636 Distinct numbers in the (1,2)-Pascal triangle A029635. %K A029636 nonn %O A029636 1,1 %A A029636 _Mohammad K. Azarian_ %E A029636 More terms from _David W. Wilson_ %E A029636 First two terms swapped by _Sean A. Irvine_, Mar 01 2020