16583
[Commentary:
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
f. ), or rather, for those numbers multiplied by 120, that is, 120, 840, 3240, .... For this he needs polynomials of the fifth degree. ]