Project Euler #128: Hexagonal tile differences

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  • + 1 comment

    what does the test case here stands for??

  • + 2 comments

    What is the Logic behind the problem ?

    I can deduce it that the rings are formed in multiple of 6...so

    2 8 20 38 62 92 128 170 218 272.... and these should be the numbers but from this my 10th tile is 272 and not 271.....

    Can anyone help in this ?

  • + 1 comment

    What is N?

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