a(2)=2; thereafter a(n) = smallest number m such that a(n-1)+m = (a(n-1) followed by the leading digit of m).

A224753

a(2)=2; thereafter a(n) = smallest number m such that a(n-1)+m = (a(n-1) followed by the leading digit of m).

Terms

    a(0) =2a(1) =19a(2) =172a(3) =1549a(4) =13942a(5) =125479a(6) =1129312a(7) =10163809a(8) =91474290a(9) =823268618a(10) =7409417569a(11) =66684758127a(12) =600162823149

External references