Pattern Recognition - 138

Find out the next two numbers in the series.

489, 491, 497, 515,569 , _ , _ , ....................

Answer

489,      491,       497,       515,     569  , _  , _  , ....................

        +2          +6         +18        +54

                  *3         *3          *3

Next two numbers   569 + (54*3)      = 731

                              731  + (54 *3 *3)= 1217

489,  491,  497, 515,569 , 731  , 1217, ....................