Problem Statement

Programming languages often have built-in routines to convert a non-negative integer for printing in different number bases. Such common number bases might include binary, Octal and Hexadecimal.

Print a small range of integers in some different bases, as supported by standard routines of your programming language.

This is distinct from Number base conversion as a user-defined conversion function is not asked for.) The reverse operation is Common number base parsing.

Let's start with the solution:

let ns = [30..33]
ns |> Seq.iter (fun n -> printfn " %3o %2d %2X" n n n)


let bases = [2; 8; 10; 16]

ns |> Seq.map (fun n -> Seq.initInfinite (fun i -> n))
|> Seq.map (fun s -> Seq.zip s bases)
|> Seq.map (Seq.map System.Convert.ToString >> Seq.toList)
|> Seq.iter (fun s -> (printfn "%6s %2s %2s %2s" s.[0] s.[1] s.[2] s.[3]))