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 A195144 #19 Mar 30 2012 18:53:49 %S A195144 5,8,895799 %N A195144 Reversal of n equals the sum of the reversals of the anti-divisors of n. %C A195144 Like A069942 but using anti-divisors. No other terms up to 3*10^10. %e A195144 The first two terms are banal cases: anti-divisors of 5 are 2 and 3 and their reversals are again 5, 2 and 3 and 2+3 = 5. The same for 8: 3+5 = 8. Anti-divisors of 895799 are 2, 3, 199, 597, 3001, 9003, 597199 and 2+3+991+795+1003+3009+991795 = 997598. %p A195144 Rev:=proc(n) %p A195144 local a,i,k; %p A195144 i:=convert(n,base,10); a:=0; %p A195144 for k from 1 to nops(i) do a:=a*10+i[k]; od; %p A195144 a; %p A195144 end: %p A195144 P:=proc(j) %p A195144 local h,m,n,r; %p A195144 for m from 3 to j do %p A195144 h:=0; %p A195144 for r from 2 to m-1 do %p A195144 if abs((m mod r)-r/2)<1 then h:=h+Rev(r); print(r); fi; %p A195144 od; %p A195144 if h=Rev(m) then print(m); fi; %p A195144 od; %p A195144 end: %p A195144 P(1000000); %Y A195144 Cf. A066272, A069942. %K A195144 nonn,hard,base,bref,more %O A195144 1,1 %A A195144 _Paolo P. Lava_ and _Donovan Johnson_, Sep 12 2011