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 A074402 #5 May 13 2018 09:15:35 %S A074402 1,2,3,4,5,6,7,8,9,10,12,13,14,15,16,18,20,21,22,24,25,26,27,28,30,32, %T A074402 33,35,36,37,39,40,42,44,45,48,49,50,52,54,56,57,58,60,63,64,65,66,70, %U A074402 72,74,75,78,80,81,84,85,88,90,91,93,96,98,99,100,102,104,105,108,110 %N A074402 Multiplicative closure of Euler's "numeri idonei" (A000926). %e A074402 22 is a term as A000926(17) = 22; 55 is not a term as 55 = 5*11 and neither 5 nor 11 are in A000926; 110 = 5*22 = A000926(5)*A000926(17), therefore 110 is a term. %K A074402 nonn %O A074402 1,2 %A A074402 _Reinhard Zumkeller_, Sep 25 2002