Pattern Recognition - 151

Find out the next two numbers in the series.
185 , 326 , 507 , 728 , _ , _ ,.....................

Answer

185 , 326 , 507 , 728 , _ , _ ,.....................

185 , 326 , 507 , 728 , _ , _ ,

                185 ,                            326                ,    507 ,                     728 , _ , _ ,

(5-2)^2 *2 =18     (6-2)^2 *2 =32     (7-2)^2 *2 =50    (8-2)^2 *2 =72

Next two numbers   (9-2)^2 *2   =98      989

                              (10-2)^2 *2 =128     12810

185 , 326 , 507 , 728 , 989 , 12810,.....................

However there was a brilliant answer for the given wrong question from some one in our team. :)     

185 , 326 , 987 , 728 , 189, 320

xyz, lastdigit of(x*3), 8 and 2 repeating, (z+1)

How I saw is to get the first digit,
multiply the number by 3
1, 3, 9, 27, 81 ...
and then take the last digit only,
so it goes as 1,3,9,7,1....