2642246,
    86251,
    11724,
    3218,
    1313,
    684,
    419,
    287,
    214,
    169,
    139,
    119,
    105,
    95,
    87,
    81,
    76,
    73,
    70,
    68,
    66,
    64,
    63,
    62,
    62,
    61,
    61,
    61
  };

    // exchanging two blocks of memory). This classic text by Gries and Mills mentions several:
    // https://ecommons.cornell.edu/bitstream/handle/1813/6292/81-452.pdf.
    // (1) "Reversal", the one we have here.
    // (2) "Dolphin". If we're rotating an array a of size n by a distance of d, then element a[0]