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 A055957 #9 Aug 08 2024 06:26:57 %S A055957 0,0,0,0,0,0,0,0,7,0,-7,-14,-21,-28,-35,-42,14,7,0,-7,-14,-21,-28,-35, %T A055957 21,14,7,0,-7,-14,-21,-28,28,21,14,7,0,-7,-14,-21,35,28,21,14,7,0,-7, %U A055957 -14,42,35,28,21,14,7,0,-7,49,42,35,28,21,14,7,0,63,0,-63,-126,-189,-252,-315,-378,63,0,-63,-126,-189,-252,-315 %N A055957 n - reversal of base 8 digits of n (written in base 10). %C A055957 a(n) is a multiple of 7. %F A055957 a(n) = n - A030107(n). %t A055957 Array[#-FromDigits[Reverse[IntegerDigits[#,8]],8]&,80,0] (* _Harvey P. Dale_, Jun 05 2012 *) %Y A055957 Cf. A030107, A056965. %K A055957 base,sign %O A055957 0,9 %A A055957 _Henry Bottomley_, Jul 18 2000