Numbers k such that both k and the k-th triangular number are palindromes.
A008510
Numbers k such that both k and the k-th triangular number are palindromes.
Terms
- a(0) =1a(1) =2a(2) =3a(3) =11a(4) =77a(5) =363a(6) =1111a(7) =2662a(8) =111111a(9) =246642a(10) =11111111a(11) =363474363a(12) =2664444662a(13) =26644444662a(14) =246644446642a(15) =266444444662
External references
- oeis: A008510