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 A117241 #9 Feb 08 2021 02:56:16 %S A117241 1,2,3,4,5,6,7,8,9,10,19,20,30,38,40,50,57,60,70,76,80,90,95,100,104, %T A117241 120,190,200,207,208,231,240,252,300,310,360,380,400,403,414,430,432, %U A117241 462,465,480,500,506,528,570,600,620,625,629,693,700,702,714,754,760,800,805,806 %N A117241 Numbers divisible by the sum of k times the k-th digit. %H A117241 Amiram Eldar, <a href="/A117241/b117241.txt">Table of n, a(n) for n = 1..10000</a> %e A117241 95 is in the sequence because 1*9 + 2*5 = 19 and 95 is divisible by 19. %e A117241 1232 is in the sequence because 1*1 + 2*2 + 3*3 + 4*2 = 22 and 1232 is divisible by 22. %t A117241 Select[Range[1000], Divisible[#, Plus @@ ((d = IntegerDigits[#]) * Range[Length[d]])] &] (* _Amiram Eldar_, Feb 08 2021 *) %Y A117241 Cf. A156207. %K A117241 base,nonn %O A117241 1,2 %A A117241 Luc Stevens (lms022(AT)yahoo.com), Apr 22 2006 %E A117241 Missing terms inserted by _Amiram Eldar_, Feb 08 2021