Index of the largest n-digit palindromic triangular number, or 0 if no such number exists.
A068644
Index of the largest n-digit palindromic triangular number, or 0 if no such number exists.
Terms
- a(0) =3a(1) =11a(2) =36a(3) =132a(4) =363a(5) =1287a(6) =3548a(7) =11088a(8) =18906a(9) =111111a(10) =417972a(11) =0a(12) =3707883a(13) =12812392a(14) =37009916a(15) =128127032a(16) =368505751a(17) =1014708805a(18) =3567632391a(19) =11151642876a(20) =36657342048a(21) =104561417190a(22) =417898160427
External references
- oeis: A068644