A328492 First differences of A240510 (Numbers whose "reverse and add" process becomes palindromic at 8813200023188).

9, 89, 99, 99, 198, 99, 99, 88, 11, 88, 329, 90, 90, 90, 90, 90, 90, 90, 369, 90, 90, 90, 90, 90, 90, 90, 369, 90, 90, 90, 90, 90, 90, 90, 369, 90, 90, 90, 90, 90, 90, 90, 369, 90, 90, 90, 90, 90, 90, 90, 369, 90, 90, 90, 90, 90, 90, 90, 369, 90, 90, 90, 90

Offset: 1

Author

Robert Price, Oct 16 2019

Keywords

• base
• nonn
• fini

Comments

Additional patterns can be seen in the bfile.

Links

• Robert Price, Table of n, a(n) for n = 1..176

Crossrefs

Cf. A033670, A240510.

Programs

Mathematica

limit = 10^3; (* Assumes that there is no palindrome if none is found before "limit" iterations *)
Differences@Select[Range[0, 50000], (np = #; i = 0;
    While[ ! PalindromeQ[np] && i < limit,
     np = np + IntegerReverse[np]; i++];
np == 8813200023188) &] (* Robert Price, Oct 16 2019 *)