Base-9 representation of a(n) is the concatenation of the base-9 representations of 1, 2, ..., n, n-1, ..., 1.

A260859

Base-9 representation of a(n) is the concatenation of the base-9 representations of 1, 2, ..., n, n-1, ..., 1.

Terms

    a(0) =0a(1) =1a(2) =100a(3) =8281a(4) =672400a(5) =54479161a(6) =4412944900a(7) =357449732641

External references