Hi my name is ***** ***** to Just Answer. I am reviewing your question and will reply ASAP.
If you set up 'Find My iPad' in the settings before being locked out you can erase without using a computer, you can use iCloud to erase and restore it.
You go to http://icloud.com/find on your iPhone, and sign in with your Apple ID.
Click All Devices at the top, and click your iPad if it is in the list, and click Erase.
Now you can set it up as new or restore from a backup if one is available.
Let me know if you have any questions on this. Reply here and I'll be right back to you.
Were you able to login to iCloud on your iPhone?Let me know how it's going and if I can help.
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Did you click Erase in iCloud?It should not be locked out so.Did you click Restore From Backup after you clicked Erase?