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    The Calendar hole will go live in approximately . Why not try and solve it ahead of time?

    Lewenhaupt

    7,195
    •
    6,681
    🥇0
    •
    🥈0
    •
    🥉0

    ⛳

    10 / 123 Holes

    🔣

    1 / 62 Langs

    🏆

    5 / 99 Cheevos

    📅

    Collatz
    961st
    Emirp Numbers
    1,331st
    Happy Numbers
    1,550th
    Leap Years
    4,252nd
    Niven Numbers
    641st
    Niven Numbers (Long)
    617th
    Pascal’s Triangle
    1,636th
    Pernicious Numbers
    1,471st
    Recamán
    369th
    Van Eck Sequence
    301st