I looked through the cemeteries listed online in Sequoyah Co. but didn't find him. But who knows if all of the cemeteries were indexed and some of the links didn't work.
There are two volunteers in Washita Co. who will look up obituaries. Their contact info is at www.gengathering.com. You do need to create a user ID and password to enter this web site but access to the volunteer info IS free. Please choose ONE at a time.
There is another volunteer in Sequoyah Co. who researches cemeteries. I'd contact him/her too. Successful Searching!