// time = 0.109 seconds

data[21]:=[*
<21, 1, 1, [ -1, 1 ], 0, [
<2, x + 1>,
<3, x - 1>,
<5, x + 2>,
<7, x + 1>,
<11, x - 4>,
<13, x + 2>,
<17, x + 6>,
<19, x - 4>
]>
*];