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 A169932 #14 Jun 20 2021 15:52:50
%S A169932 0,0,0,0,0,0,0,0,0,0,10,10,10,10,10,10,10,10,10,10,20,20,20,20,20,20,
%T A169932 20,20,20,20,30,30,30,30,30,30,30,30,30,30,40,40,40,40,40,40,40,40,40,
%U A169932 40,50,50,50,50,50,50,50,50,50,50,60,60,60,60,60,60,60,60,60,60,70,70,70,70,70
%N A169932 a(n) = 0+n in the arithmetic defined in A169918.
%C A169932 Equivalently, set to zero the last (decimal) digit of n, i.e., subtract (n mod 10). The digit-wise addition defined in A169918 consists of multiplying the digits and taking this product modulo 10 for each digit, and "Blanks are ignored". Since 0 has only one digit, only the last digit of n is set to zero in that way. - _M. F. Hasler_, Mar 25 2015
%F A169932 a(n) = [n/10]*10. - _M. F. Hasler_, Mar 25 2015
%t A169932 Join[{0},10 Floor[Range[80]/10]] (* _Harvey P. Dale_, Jun 20 2021 *)
%o A169932 (PARI) A169932(n) = n\10*10 \\ _M. F. Hasler_, Mar 25 2015
%Y A169932 Cf. A169918.
%K A169932 nonn,base
%O A169932 0,11
%A A169932 _David Applegate_, _Marc LeBrun_ and _N. J. A. Sloane_, Jul 20 2010