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 A213635 #7 Feb 22 2023 18:14:50 %S A213635 0,0,2,3,4,4,6,6,8,9,10,10,12,12,14,15,16,16,18,18,20,21,22,20,24,24, %T A213635 26,27,28,28,30,30,32,33,34,35,36,36,38,39,40,40,42,42,44,45,46,45,48, %U A213635 48,50,51,52,52,54,54,56,57,58,56,60,60,62,63,64,64,66,66,68 %N A213635 m*[n/m], where m is the least nondivisor of n (as in A007978) and [ ] = floor. %t A213635 (See A213633.) %o A213635 (Python) %o A213635 def A213635(n): return n-next(filter(None, (n%d for d in range(2,n)))) if n>2 else 0 # _Chai Wah Wu_, Feb 22 2023 %Y A213635 Cf. A213633. %K A213635 nonn,easy %O A213635 1,3 %A A213635 _Clark Kimberling_, Jun 16 2012