The first few numbers not known to produce palindromes when applying the 196-algorithm (i.e., a reverse-then-add
sequence) are sometimes known as Lychrel numbers. This term was coined by VanLandingham
in 2002 as a variation of his girlfriend Cheryl's name (VanLandingham, pers. comm.,
Jun. 9, 2005).
The first few Lychrel numbers are 196, 295, 394, 493, 592, 689, 691, 788, 790, 879, 887, ... (OEIS A023108). All Lychrel numbers
with 17 or fewer digits are tabulated at http://www.p196.org/.
