Algoritmo [1234.4123.3412.2341]

int iNum;
int iVal;
int iFilas;
int iValor;

iValor = 4;
iVal = iValor;

for (iNum = 1; iNum <= iValor; iNum ++)
{
    System.out.println(iNum);
}

System.out.println("\n");

for (iFilas = 1; iFilas <= iValor - 1; iFilas ++)
{
    for (iNum = iVal; iNum <= iValor; iNum ++)
    {
        System.out.println(iNum);
    }

    for (iNum = 1; iNum <= iVal - 1; iNum ++)
    {
        System.out.println(iNum);
    }

    iVal = iVal - 1;

    System.out.println("\n");
}