OFFSET
1,2
COMMENTS
a(19) = 0. This is the only zero in the sequence. Every other integer k > 9 has digit sum <= k/2, so the center can always be filled in to make a palindrome.
CROSSREFS
KEYWORD
base,easy,nonn
AUTHOR
Amarnath Murthy and Meenakshi Shrikant (menakan_s(AT)yahoo.com), Apr 09 2003
STATUS
approved