id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
cbi-36	Bartlett, Jonathan; Khurshudyan, Asatur Zh	Numberphile’s Proof for the Sum 1+2+3+...	2018	2	.pdf	application/pdf	1236	105	81	S3 − 1 4 = 4S3 (5) 3S3 = − 1 4 (6) S3 = − 1 12 (7) This gives the equation S3 − S2 = 4S3.	cache/cbi-36.pdf	txt/cbi-36.txt