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 A358988 #39 Jul 08 2025 19:19:46
%S A358988 210,462,870,930,1122,1190,1482,1722,1806,3306,4422,4970,6162,7310,
%T A358988 7482,8742,8930,10302,10506,11990,12882,14042,15006,17030,17822,18906,
%U A358988 19182,20022,20306,21170,25122,30102,31506,32942,36290,40602,41006,42230,45582,46010,47306
%N A358988 Oblong numbers which are products of four distinct primes.
%H A358988 Harvey P. Dale, <a href="/A358988/b358988.txt">Table of n, a(n) for n = 1..1000</a>
%e A358988 210 = 14*15 = 2*3*5*7.
%e A358988 1122 = 33*34 = 2*3*11*17.
%e A358988 10302 = 101*102 = 2*3*17*101.
%e A358988 20306 = 142*143 = 2*11*13*71.
%t A358988 Select[(#*(# + 1)) & /@ Range[220], FactorInteger[#][[;; , 2]] == {1, 1, 1, 1} &] (* _Amiram Eldar_, Dec 10 2022 *)
%t A358988 Select[Times@@@Partition[Range[400],2,1],PrimeNu[#]==PrimeOmega[#]==4&] (* _Harvey P. Dale_, Jul 08 2025 *)
%Y A358988 Intersection of A002378 and A046386.
%K A358988 nonn
%O A358988 1,1
%A A358988 _Massimo Kofler_, Dec 10 2022