OFFSET
1,2
LINKS
David A. Corneth, Table of n, a(n) for n = 1..10000 (first 1000 terms from Harvey P. Dale)
FORMULA
EXAMPLE
a(11) = 36 because 36 is the sum of divisors of 11th nonzero palindromic number (i.e. 22).
MATHEMATICA
DivisorSigma[1, #]&/@Select[Range[500], PalindromeQ] (* Requires Mathematica version 10 or later *) (* Harvey P. Dale, Mar 06 2018 *)
CROSSREFS
KEYWORD
AUTHOR
Shyam Sunder Gupta, Nov 25 2002
EXTENSIONS
Both title and example clarified by Omar E. Pol, Dec 08 2019
STATUS
approved