SQL & PL/SQL

I would like to create records based on column FROM/TO number using a SQL statement.

Below is a sample table:

Table A has 2 columns (col1 and col2 as number).

COL1 value=1 and COL2 value=5.

I want to insert 5 records in a table from the value of col1 and col2 using SQL. I can do it in PL/SQL but I can't in a single SQL statement. Below is the sample # of records that should be created in the table.

rec1
rec2
rec3
rec4
rec5

Appreciate any help.