assume you have 1 in cell a1 and you want your second ticket number in cell
A6. In A1 put in =A1+1
then select the cells that make up your second ticked and do edit =>copy
then select a range below that will hold an integer number of tickets and do
Edit=>Paste
An alternative would be a macro
Sub NumberTickets()
Dim i as Long, j as long
j = 0
for i = 1 to 300 step 5
cells(i,1).Value = J + 1
j = j + 1
Next
end Sub