tentukan barisan bilangan yang rumusnya N(N+1)

[tex]1(1 + 1) = 2 \\ 2(2 + 1) = 6 \\ 3(3 + 1) = 12 \\ 4(4 + 1) = 20 \\ 5(5 + 1) = 30 \\ 6(6 + 1) = 42 \\ 7(7 + 1) = 56 \\ 8(8 + 1) = 72 \\ 9(9 + 1) = 90 \\ 10(10 + 1) = 110 \\ \\ dst[/tex]