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 A050736 #7 Oct 16 2019 01:13:28 %S A050736 1,6,36,216,1296,1679616,362797056,13060694016,78364164096, %T A050736 470184984576,170581728179578208256 %N A050736 Numbers of form 6^k (values of k see A050727) containing no pair of consecutive equal digits (probably finite). %t A050736 Select[6^Range[0,26],FreeQ[Differences[IntegerDigits[#]],0]&] (* _Harvey P. Dale_, Jul 23 2018 *) %Y A050736 Cf. A043096, A050727. %K A050736 nonn,base %O A050736 0,2 %A A050736 _Patrick De Geest_, Sep 15 1999