a(0)=1; a(n) is the leading digit of a(n-1) multiplied by n concatenated with the remaining digits of a(n-1).

A337770

a(0)=1; a(n) is the leading digit of a(n-1) multiplied by n concatenated with the remaining digits of a(n-1).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =104a(6) =604a(7) =4204a(8) =32204a(9) =272204a(10) =2072204a(11) =22072204a(12) =242072204a(13) =2642072204a(14) =28642072204a(15) =308642072204

External references