Short PL/SQL block to print the characters in range [033..256]
set serveroutput on
declare
i number;
j number;
k number;
begin
for i in 2..15 loop
for j in 1..16 loop
k:=i*16+j;
dbms_output.put((to_char(k,'000')) || ':' || chr(k) || ' ' );
if k mod 8 = 0 then
dbms_output.put_line('');
end if;
end loop;
end loop;
end;