11 7 5 13 July 8, 2019 16 32 64 128 11 3y 4 )+ 5 7 13y 5 7 11 13 sequence 11 7 x 13 5 11 3y − 4 5 7 13y Series 5 7 11 13 11 1 13 x 7 5 12
