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 A354447 #18 Feb 16 2025 08:34:03
%S A354447 684019,704977,2691451,3242197,3375001,4931101,5318677,5772403,
%T A354447 8872487,10702783,16983854,20616463,24897817,41258737,46343059,
%U A354447 60698521,66469429,69625969,79692193,89576767,95731489,96753187,97867441,116773741,119793457,126516061,147187369
%N A354447 Taxicab numbers (sums of 2 cubes in more than 1 way) which are products of four distinct primes.
%C A354447 A squarefree subsequence of taxicab numbers.
%H A354447 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/TaxicabNumber.html">Taxicab Number</a>
%e A354447 684019 = 51^3 + 82^3 = 64^3 + 75^3 = 7 * 19 * 37 * 139.
%e A354447 8872487 = 14^3 + 207^3 = 140^3 + 183^3 = 13 * 17 * 19 * 2113.
%e A354447 96753187 = 147^3 + 454^3 = 283^3 + 420^3 = 19 * 37 * 229 * 601.
%t A354447 Select[Range[10^6], FactorInteger[#][[;; , 2]] == {1, 1, 1, 1} && Length @ PowersRepresentations[#, 2, 3] > 1 &] (* _Amiram Eldar_, May 30 2022 *)
%Y A354447 Intersection of A001235 and A046386.
%K A354447 nonn
%O A354447 1,1
%A A354447 _Massimo Kofler_, May 30 2022