Triangle of the gods: to get a(n), concatenate the decimal numbers 1,2,3,...,n.

A007908

Triangle of the gods: to get a(n), concatenate the decimal numbers 1,2,3,...,n.

Terms

    a(0) =1a(1) =12a(2) =123a(3) =1234a(4) =12345a(5) =123456a(6) =1234567a(7) =12345678a(8) =123456789a(9) =12345678910

External references