cp's OEIS Frontend

A187829 Numbers that when converted to hexadecimal and the letters are replaced by base 10 equivalents, result in the same number.

%I A187829 #24 May 11 2023 18:14:40
%S A187829 1,2,3,4,5,6,7,8,9,10,11,12,13,14,15,4494410,4494411,4494412,4494413,
%T A187829 4494414,4494415,4715360,4715361,4715362,4715363,4715364,4715365,
%U A187829 4715366,4715367,4715368,4715369,5660810,5660811,5660812,5660813,5660814,5660815
%N A187829 Numbers that when converted to hexadecimal and the letters are replaced by base 10 equivalents, result in the same number.
%H A187829 Ross Millikan, <a href="/A187829/b187829.txt">Table of n, a(n) for n = 1..85</a>
%e A187829 4494410 in hex is 44944A.  Replacing A in the string results in 4494410.
%o A187829 (Python)
%o A187829 def hexmatch(inp):
%o A187829     h=hex(inp)
%o A187829     ho=''
%o A187829     for i in h[2:]:
%o A187829         if i=='a': ho+='10'
%o A187829         elif i=='b' :ho+='11'
%o A187829         elif i=='c' :ho+='12'
%o A187829         elif i=='d' :ho+='13'
%o A187829         elif i=='e' :ho+='14'
%o A187829         elif i=='f' :ho+='15'
%o A187829         else: ho +=i
%o A187829     return ho
%o A187829 def loop(start, stop):
%o A187829     rec=100000000
%o A187829     for i in range(start, stop):
%o A187829         val=int(hexmatch(i))
%o A187829         diff=val-i
%o A187829         if diff==0: print(i, end=', ')
%o A187829 loop(1, 5660816)
%K A187829 base,nonn
%O A187829 1,2
%A A187829 _Ross Millikan_, Dec 27 2012