crontab - Wait 60 Seconds to Run Cron Job After Reboot Then Run Job Every 10 Minutes -

i have script run 60 seconds after initial system reboot , every 10 minutes after that. need 2 cron job listings achieve this:

*/10 * * * * php myscript.php @reboot /bin/sleep 60; php myscript.php 

the first listing run cron job after system boot , need have second listing account on start wait time.

is there anyway combine above 2 cron listings one?