<s xml:space="preserve">
On this folio Harriot appears to be searching a formula for the sequence 1, 7, 27, 77, ...
of sums of sums of square-pyramidal numbers (see Add MS 6782
<ref target="http://echo.mpiwg-berlin.mpg.de/ECHOdocuView?url=/permanent/library/HSPGZ0AE&start=300&viewMode=image&pn=309">
f. </ref>
), or rather, for those numbers multiplied by 120, that is, 120, 840, 3240, .... For this he needs polynomials of the fifth degree. </s>