You can't kidnap Khriz then! the answer is ... 3 ( 3 x 1 ) + ( 3 x 2 ) + ( 3 x 3 ) + 5 (( 3 x 1 ) + 7 ) + (( 3 x 2 ) + 7 ) + (( 3 x 3 ) + 7 ) + (( 3 x 4 ) + 7 ) = 3 x ( 3 + 6 + 9 ) + 5 ( 3 + 7 ) + ( 6 + 7 ) + ( 9 + 7 ) + ( 12 + 7 ) = 3 ( 3 + 6 + 9 ) + 5 ( 10 + 13 + 16 + 19 ) = 3 x 18 + 5 x 58 = 344
∑^6 = 4n
n = 1