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 A056963 #12 Aug 08 2024 11:04:58 %S A056963 0,1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,16,17,18,19,1,21,41,61,81,101, %T A056963 121,141,161,181,201,221,241,261,281,301,321,341,361,381,2,22,42,62, %U A056963 82,102,122,142,162,182,202,222,242,262,282,302,322,342,362,382,3,23,43 %N A056963 Base 20 reversal of n (written in base 10). %H A056963 Paolo Xausa, <a href="/A056963/b056963.txt">Table of n, a(n) for n = 0..10000</a> %t A056963 IntegerReverse[Range[0, 100], 20] (* _Paolo Xausa_, Aug 08 2024 *) %Y A056963 Cf. A004086, A030101-A030108, A056960, A056961, A056962. %K A056963 base,nonn %O A056963 0,3 %A A056963 _Henry Bottomley_, Jul 18 2000