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    Connell Sequence

    Sequence description

    1 odd number, 2 even numbers, 3 odd numbers, ...

    Sequence terms

    1, 2, 4, 5, 7, 9, 10, 12, 14, 16, 17, 19, 21, 23, 25, 26, 28, 30, 32, 34, 36, 37, 39, ...

    Formula

    a_n = 2 n - floor(1/2 (sqrt(8 n - 7) + 1))

    Plot

    Plot

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