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 A276946 #5 Sep 24 2016 10:49:02 %S A276946 1,2,3,6,10,4,15,5,21,28,36,9,45,14,55,66,78,91,105,120,136,153,171, %T A276946 190,210,231,253,276,300,7,325,20,351,378,406,8,435,27,465,496,528,35, %U A276946 561,44,595,630,666,703,741,780,820,861,903,946,990,1035,1081,1128,1176,13,1225,54,1275,1326,1378,19,1431,65,1485,1540,1596,77,1653,90 %N A276946 Inverse permutation to A276945. %H A276946 <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a> %H A276946 <a href="/index/Pri#primorialbase">Index entries for sequences related to primorial base</a> %Y A276946 Inverse: A276945. %Y A276946 Differs from analogous A276956 for the first time at n=24, where a(24)=190, while A276956(24)=7. %K A276946 nonn,base %O A276946 1,2 %A A276946 _Antti Karttunen_, Sep 24 2016