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From: stephen@datacube.UUCP
Newsgroups: net.math
Subject: Re: series sum
Message-ID: <8900003@datacube.UUCP>
Date: Tue, 28-Jan-86 13:26:00 EST
Article-I.D.: datacube.8900003
Posted: Tue Jan 28 13:26:00 1986
Date-Received: Sat, 1-Feb-86 04:32:25 EST
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Nf-ID: #R:utcsstat:-226500:datacube:8900003:000:269
Nf-From: datacube!stephen    Jan 28 13:26:00 1986


>	Can anyone deduce the sum of the following series after n terms?
>
>	  1 + 3 + 6 + 10 + 15 + 21 + .....

Yeah, its: n*(n^2 + 3*n + 2)/6.


Stephen Watkins                    UUCP: ihnp4!datacube!stephen
Datacube Inc.; 4 Dearborn Rd.; Peabody, Ma. 01960; 617-535-6644