Palindromic triangular number with palindromic index.

A229236

Palindromic triangular number with palindromic index.

Terms

    a(0) =1a(1) =3a(2) =6a(3) =66a(4) =3003a(5) =66066a(6) =617716a(7) =3544453a(8) =6172882716a(9) =30416261403

External references