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 A325805 #15 Sep 10 2019 14:16:42 %S A325805 0,1,2,3,4,5,6,15,8,9,10,11,12,13,14,23,16,17,18,19,20,21,22,31,24,25, %T A325805 26,27,28,29,30,39,32,33,34,35,36,37,38,47,40,41,42,43,44,45,46,55,48, %U A325805 49,50,51,52,53,54,63,56,57,58,59,60,61,126,71,64,65,66,67,68,69,70,79 %N A325805 "Sloping octal numbers": write numbers in octal under each other (right-justified), read diagonals in upward direction, convert to decimal. %H A325805 Seiichi Manyama, <a href="/A325805/b325805.txt">Table of n, a(n) for n = 0..10000</a> %H A325805 Wikipedia, <a href="https://en.wikipedia.org/wiki/Octal">Octal</a> %Y A325805 Cf. A102370 (base 2), A109681 (base 3), A325644 (base 4), A325645 (base 5), A325692 (base 6), A325693 (base 7), this sequence (base 8), A325829 (base 9), A103205 (base 10). %K A325805 nonn,base %O A325805 0,3 %A A325805 _Seiichi Manyama_, Sep 07 2019