-6
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What are the next 2 numbers in the series 1, 1, 2, 4,6, 18, 21, 84, ?, ?

Please give a valid reason to justify your answer.

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  • 4
    $\begingroup$ This sequence can be directly looked-up on oeis.org/A019464 $\endgroup$ – Nejc Apr 20 '15 at 13:46
8
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The next two numbers in the series are:

88, 440

The series is:

*1, +1, *2, +2, *3, +3, *4, +4, *5, +5, etc.

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