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 A378480 #11 May 07 2025 12:20:07
%S A378480 105,110,130,154,165,170,182,190,195,230,231,238,255,266,273,285,286,
%T A378480 290,310,322,345,357,370,374,385,399,406,410,418,429,430,434,435,442,
%U A378480 455,465,470,483,494,506,518,530,555,561,574,590,595,598,602,609,610,615,627,638,645,646,651,658,663,665
%N A378480 Products of 3 distinct prime numbers (or sphenics) that are deficient.
%e A378480 105 is a term because 105=3*5*7 is the product of three distinct primes and it is larger than the sum of its proper divisors (1+3+5+7+15+21+35=87).
%e A378480 110 is a term because 110=2*5*11 is the product of three distinct primes and it is larger than the sum of its proper divisors (1+2+5+10+11+22+55=106).
%t A378480 q[n_] := Module[{f = FactorInteger[n]}, f[[;; , 2]] == {1, 1, 1} && Times @@ (1 + 1/f[[;; , 1]]) < 2]; Select[Range[1000], q] (* _Amiram Eldar_, Nov 28 2024 *)
%Y A378480 Intersection of A005100 and A007304.
%K A378480 nonn
%O A378480 1,1
%A A378480 _Massimo Kofler_, Nov 28 2024