2,6,12,20,30,42,( ) ( )

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2,6,12,20,30,42,()()2,6,12,20,30,42,()()2,6,12,20,30,42,()()54,62

2,6,12,20,30,42,( ) ( )
2,6,12,20,30,42,( ) ( )

2,6,12,20,30,42,( ) ( )
54,62