178727871domain: NAppears in sequencesPalindromic triangular numbers.at n=24A003098Palindromic binomial coefficients C(n,k) for k >= 2.at n=34A051641Smallest n-digit palindromic triangular number, or 0 if no such number exists.at n=8A068641Largest n-digit palindromic triangular number, or 0 if no such number exists.at n=8A068643