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How to find sequence formula

I am looking for a sequence formula. The sequence is {1,5,18, 56,160,432}.

I tried using wolframs mathematica - FindSequenceFunction and FindGeneratingFunction. First one did not even give me a function, second one gave me 1-n/(1-2n)^3 which i dont see how this can be right. Maybe I dont understand mathematica properly. Thanks for help

Solution

  • Go to

    https://oeis.org/

    and enter

    1,5,18,56,160,432

    and tap Search

    and in a fraction of a second it finds that you are not the first person looking at that sequence, that sequence has actually shown up in two different contexts.