Numbers k such that reverse(T(k)) = T(reverse(k)) where T(k) is the k-th triangular number.

A279084

Numbers k such that reverse(T(k)) = T(reverse(k)) where T(k) is the k-th triangular number.

Terms

    a(0) =0a(1) =1a(2) =2a(3) =3a(4) =11a(5) =77a(6) =363a(7) =1111a(8) =2662a(9) =24662a(10) =26642a(11) =111111a(12) =246642a(13) =11111111a(14) =363474363a(15) =2664444662

External references