1680861
domain: N
Appears in sequences
- Palindromic triangular numbers.at n=17A003098
- Palindromic binomial coefficients C(n,k) for k >= 2.at n=25A051641
- Palindromic hexagonal numbers.at n=11A054969
- Triangular numbers whose digit reversal is also a triangular number.at n=34A061455
- Triangular numbers whose reverse is also triangular.at n=23A066569