: Array
(
    [0] => Array
        (
            [0] => 1
            [1] => 2
            [2] => 3
            [3] => 4
            [4] => 5
            [5] => 6
            [6] => 7
            [7] => 8
            [8] => 9
            [9] => 10
            [10] => 11
            [11] => 12
            [12] => 13
            [13] => 14
            [14] => 15
        )

    [1] => Array
        (
            [0] => 17
        )

    [2] => Array
        (
            [0] => 19
        )

    [3] => Array
        (
            [0] => 20
            [1] => 21
            [2] => 22
            [3] => 23
            [4] => 24
            [5] => 25
        )

    [4] => Array
        (
            [0] => 30
        )

)