Answer Posted / sham

int main()
{
int i,j,k,l=0,n;
printf("Enter the length\n");
scanf("%d",&n);
for(i=1;i<=n;i++)
{
k=2;
for(j=0;j<i+l;j++)
{
if(i<=j)
{
printf("%d",i+j-k);
k=k+2;
}
else
printf("%d",i+j);
}
l++;
printf("\n");
}
}

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