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 A164836 #7 Nov 11 2017 12:58:29 %S A164836 0,1,2,3,4,5,6,7,8,9,10,12,14,16,18,20,22,24,26,28,30,32,34,36,38,40, %T A164836 42,44,46,48,50,52,54,56,58,60,62,64,66,68,70,72,74,76,78,80,82,84,86, %U A164836 88,90,92,94,96,98,102,108,114,120,126,132,138,144,150,156,162,168,174,180 %N A164836 a(n) is the number such that every k-digit substring ( k <= n ) taken from the right end, is divisible by k. %e A164836 144 is a member of the sequence since 4 is divisible by 1, 44 is divisible by 2 and 144 is divisible by 3. %e A164836 For 30-digit number 177723702519951630930135507600 we have: 1 | 0, 2 | 0, 3 | 600, 4 | 7600, 5 | 7600, 6 | 507600, ... [_Jaroslav Krizek_, Feb 19 2010] %t A164836 ekdsQ[n_]:=Module[{idn=IntegerDigits[n]},And@@Table[Divisible[ FromDigits[ Take[ idn,-k]],k],{k,IntegerLength[n]}]]; Select[Range[0,200],ekdsQ] (* _Harvey P. Dale_, Nov 11 2017 *) %K A164836 nonn,base %O A164836 1,3 %A A164836 _Gaurav Kumar_, Aug 28 2009