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 A382896 #10 Apr 08 2025 09:35:40 %S A382896 438,483,627,645,654,663,762,861,915,1086,1581,1626,1842,2067,2265, %T A382896 2373,2409,2679,2751,3138,3246,3345,3615,4173,4191,4209,4974,5253, %U A382896 5298,5397,5946,6054,6315,6531,6567,6585,6603,6693,6702,6855,6981,7026,7089,7287 %N A382896 Smith sphenic numbers, i.e., Smith numbers (A006753) that are the product of three distinct prime numbers. %H A382896 Shyam Sunder Gupta, <a href="/A382896/b382896.txt">Table of n, a(n) for n = 1..7523</a> %H A382896 Shyam Sunder Gupta, <a href="https://doi.org/10.1007/978-981-97-2465-9_4">Smith Numbers</a>, Exploring the Beauty of Fascinating Numbers, Springer (2025) Ch. 4, 127-157. %e A382896 438 is a term since 438 = 2 * 3 * 73, so it is the product of three distinct prime numbers (2, 3, and 73) and also a Smith number (4 + 3 + 8 = 2 + 3 + 7 + 3). %Y A382896 Intersection of A006753 and A007304. %K A382896 nonn,base %O A382896 1,1 %A A382896 _Shyam Sunder Gupta_, Apr 08 2025