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 A179998 #16 Sep 08 2022 08:45:54
%S A179998 1,2,101,573,3836,29228,250749,2409581,3727542188,50626553988,
%T A179998 738680521142,11501573822788,190418421447330,3344822488498265,
%U A179998 24965661442811799655,538134522243713149122,12140037056605135928410
%N A179998 Numbers which are members of both A000140 and A039909.
%H A179998 Vincenzo Librandi, <a href="/A179998/b179998.txt">Table of n, a(n) for n = 1..97</a>
%o A179998 (Magma) PS<x>:=PowerSeriesRing(Integers()); { Max(Coefficients(&*[&+[ x^i: i in [0..j] ]: j in [0..n-1] ])): n in [1..25] } meet { Max(Coefficients(&*[&+[ (-x)^i: i in [0..j] ]: j in [0..n] ])): n in [1..24] }; // _Klaus Brockhaus_, Jan 18 2011
%K A179998 nonn
%O A179998 1,2
%A A179998 _Paul Muljadi_, Jan 13 2011