allocated for Lars BlombergSolutions to x/SOD(x) = y, where x and y are palindromes, a(n)=x.
1, 2, 3, 4, 5, 6, 7, 8, 9, 279972, 2774772, 5499945, 25477452, 27722772, 254545452, 277202772, 279999972, 2133333312, 2522772252, 2545225452, 2772002772, 4266666624, 6399999936, 21331413312, 23466666432, 25225452252, 25452025452, 25479997452, 27720002772
1,2
"SOD" = "sum of digits".
Lars Blomberg, <a href="/A276142/b276142.txt">Table of n, a(n) for n = 1..10000</a>
<a href="http://www.primepuzzles.net/puzzles/puzz_041.htm">Puzzle 41.- Palindromic Carnival</a>, section B.
279972/SOD(279972) = 279972/36 = 7777, so 279972 is a term.
allocated
nonn,base
Lars Blomberg, Aug 22 2016
approved
editing