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 A105949 #5 Feb 16 2025 08:32:57
%S A105949 1,3,9,11,21,27,39,49,71,81,121,131,241,243,343,441,443,729,815,1331,
%T A105949 1499,1521,2187,2401,2757,5041,5071,6561,9261,9327,14641,16807,17155,
%U A105949 17161,19683,31553,58035,58081,59049,59319,106743,117649,161051,177147
%N A105949 Powers of 3-Step Lucas numbers (A001644).
%C A105949 A001644 3-Step Lucas numbers. A000032 Lucas numbers. A001254 Squares of Lucas numbers. A075155 Cubes of Lucas numbers. A099923 Fourth powers of Lucas numbers. A103325 Fifth powers of Lucas numbers. A103324 Square array T(n,k) read by antidiagonals: powers of Lucas numbers. A105317 Powers of Fibonacci numbers.
%H A105949 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/Lucasn-StepNumber.html">Lucas n-Step Number.</a>
%F A105949 {A001644(n)} U {A001644(n)^2} U {A001644(n)^3}...
%Y A105949 Cf. A001644, A105317.
%K A105949 easy,nonn
%O A105949 1,2
%A A105949 _Jonathan Vos Post_, Apr 27 2005