Palindromic Triangular Numbers/Mistake 2

Source Work

 * The Dictionary
 * $828,828$
 * $828,828$

Mistake

 * The only triangular palindrome, apart from $55$, $66$ and $666$.

Correction
From Palindromic Triangular Numbers, it can be seen that the sequence of triangular numbers which are also palindromic begins:
 * $1, 3, 6, 55, 66, 171, 595, 666, 3003, 5995, 8778, 15 \, 051, 66 \, 066, 617 \, 716, 828 \, 828, 1 \, 269 \, 621, 1 \, 680 \, 861, 3 \, 544 \, 453, \ldots$

In, this statement has been removed, and replace by Palindromic Triangular Numbers with Palindromic Halves, which is what he may have been searching for here.