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 A359849 #11 Feb 16 2025 08:34:04
%S A359849 1,2,15,1490,39648,28074040,100808458960497,9966792788887776,
%T A359849 4997150614173857218560,1835682610171974487231869,
%U A359849 889487735339682550112673527109223032,52499930084496170026238596234557616056408988199026780675759699719704592
%N A359849 a(n) is the smallest tetranacci number (A000078) with exactly n distinct prime factors.
%H A359849 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/DistinctPrimeFactors.html">Distinct Prime Factors</a>
%H A359849 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TetranacciNumber.html">Tetranacci Number</a>
%F A359849 a(n) = A000078(A359851(n)). - _Daniel Suteu_, Jan 18 2023
%e A359849 a(4) = 39648, because 39648 is a tetranacci number with 4 distinct prime factors {2, 3, 7, 59} and this is the smallest such number.
%Y A359849 Cf. A000078, A001221, A060319, A359848, A359851.
%K A359849 nonn
%O A359849 0,2
%A A359849 _Ilya Gutkovskiy_, Jan 15 2023
%E A359849 a(11) from _Daniel Suteu_, Jan 18 2023