Today anyone with a reasonable quality computer & a good Internet connection can research & compare various number patterns. http://www.coasttocoastam.com/show/2013/03/26
http://www.youtube.com/watch?v=PaEXLP0P3Zs&list=PLRtX8DKNS2yXeBFg3Ra8uMG78hg8PF_Un&index=1
http://www.youtube.com/watch?v=PaEXLP0P3Zs&list=PLRtX8DKNS2yXeBFg3Ra8uMG78hg8PF_Un&index=1
http://www.youtube.com/watch?v=3A6jGmjoMpE&list=PLxcJfdIsLenrPErRc8cHdrPx_Yq-8QStz&index=1
http://www.youtube.com/watch?v=PaEXLP0P3Zs , http://www.youtube.com/watch?v=3A6jGmjoMpE
http://www.youtube.com/watch?v=PaEXLP0P3Zs , http://www.youtube.com/watch?v=3A6jGmjoMpE