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 A339897 #4 Dec 24 2020 21:22:24 %S A339897 1,8,27,54,162,343,961,1369,1849,2809,3721,4489,5329,6889,7921,10201, %T A339897 11449,12769,16129,18769,22201,22801,26569,29929,32761,36481,38809, %U A339897 44521,49729,52441,57121,58081,66049,72361,76729,78961,85849,96721,97969,109561,120409,124609,128881,139129,146689,151321,160801,175561 %N A339897 The position of the first n in A339895. %F A339897 a(A339895(n)) = n, for all n >= 0. %Y A339897 Cf. A339895. %K A339897 nonn %O A339897 0,2 %A A339897 _Antti Karttunen_, Dec 21 2020