STATUS
proposed
approved
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Revision History for A340835
(Bold, blue-underlined text is an addition; faded, red-underlined text is aShowing entries 1-10 | older changes
a(n) is the least k such that the digit reversal of k is greater than or equal to n.
(history; published version)
(history; published version)
STATUS
editing
proposed
PROG
return int('1'+'0'*(len(s2)-1)+str(int(s1)+1)[::-1]) # Chai Wah Wu, Mar 14 2021
PROG
(Python)
def A340835(n):
if n == 0:
return 0
s = str(n)
for i, x in enumerate(s):
if x != '9':
break
else:
return n
s1, s2 = s[:i+1], s[i+1:]
if s2 == '':
if s1[-1] == '0':
return int(str(n+1)[::-1])
else:
return int(s[::-1])
if int(s2) <= 1:
return int('1'+s2[-2::-1]+s1[::-1])
else:
return int('1'+'0'*(len(s2)-1)+str(int(s1)+1)[::-1]) # Chai Wah Wu, Mar 14 2021
STATUS
approved
editing
STATUS
proposed
approved
STATUS
editing
proposed
LINKS
Rémy Sigrist, <a href="/A340835/b340835.txt">Table of n, a(n) for n = 0..10000</a>
STATUS
approved
editing
STATUS
proposed
approved
STATUS
editing
proposed