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 A173576 #5 Apr 16 2024 22:05:43 %S A173576 1,2,3,4,5,6,7,29 %N A173576 6-Factorions: equal to the sum of the 6-ple factorials of their digits in base 10. %e A173576 29 -> 2!!!!!! + 9!!!!!! = 2 + 9*3 = 2 + 27 = 29. %p A173576 P:=proc(n,m) local a,b,i,j,k,x,w; for i from 1 by 1 to n do a:=0; b:=0; w:=0; k:=i; while k>0 do w:=k-(trunc(k/10)*10); j:=w; x:=w-m; if w=0 then b:=1; else while x>0 do j:=j*x; x:=x-m; od; b:=j; fi; a:=a+b; k:=trunc(k/10); od; if a=i then lprint(i,a); fi; od; end: P(1000,6); %Y A173576 Cf. A014080, A097653, A173573-A173575, A173577. %K A173576 easy,fini,nonn,base %O A173576 1,2 %A A173576 _Paolo P. Lava_, Feb 22 2010