OFFSET
1,3
COMMENTS
For the first 2729 terms, most of them have digit sum 33. The only terms a(n) for n <= 2729 for which the digit sum is not 33 are for n = 1,...,10, 716, 2194, 2195. - Chai Wah Wu, May 15 2020
LINKS
Chai Wah Wu, Table of n, a(n) for n = 1..2729
EXAMPLE
The sum of digits of 829 is 19 and 829*19 = 15751 and 829+19 = 848 are palindromes, so 829 is a term.
MATHEMATICA
Select[Range[0, 999], (s = Plus @@ IntegerDigits[#]; PalindromeQ[# s] && PalindromeQ[# + s]) &]
PROG
(PARI) ispal(n) = my(d=digits(n)); d == Vecrev(d);
isok(m) = my(s=sumdigits(m)); ispal(m*s) && ispal(m+s); \\ Michel Marcus, May 08 2020
CROSSREFS
KEYWORD
nonn,base
AUTHOR
Giovanni Resta, May 07 2020
STATUS
approved