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 A162349 #16 Feb 03 2024 10:16:51 %S A162349 3,9,9,27,9,27,27,81,9,27,27,81,27,81,81,243,9,27,27,81,27,81,81,243, %T A162349 27,81,81,243,81,243,243,729,9,27,27,81,27,81,81,243,27,81,81,243,81, %U A162349 243,243,729,27,81,81,243,81,243,243,729,81,243,243,729,243,729 %N A162349 First differences of A160412. %C A162349 Note that if A048883 is written as a triangle then rows converge to this sequence. - _Omar E. Pol_, Nov 15 2009 %H A162349 Omar E. Pol, <a href="http://www.polprimos.com/imagenespub/polca029.jpg">Illustration of initial terms (Neighbors of the vertices)</a>. %F A162349 a(n) = 3^A063787(n) = 3 * A048883(n-1). - _Amiram Eldar_, Feb 02 2024 %t A162349 a[n_] := 3^(1 + DigitCount[n - 1, 2, 1]); Array[a, 100] (* _Amiram Eldar_, Feb 02 2024 *) %Y A162349 Cf. A063787, A152980, A160410, A160411, A160412, A160414, A160415, A160417, A160797. %Y A162349 Cf. A048883, A161415. - _Omar E. Pol_, Nov 15 2009 %K A162349 nonn %O A162349 1,1 %A A162349 _Omar E. Pol_, Jul 14 2009 %E A162349 More terms from _Omar E. Pol_, Nov 15 2009 %E A162349 More terms from _Colin Barker_, Apr 19 2015 %E A162349 More terms from _Amiram Eldar_, Feb 02 2024