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tetrahedral number

triangular pyramidal number
Type of Math Object: 
Major Section: 

Mathematics Subject Classification

11A99 no label found


I've seen a recent high interest in integer pattern/sequence entries for PM. Most of these quote Sloane's On-line encyclopedia of integer sequences. As I play with the OEIS, I think it is a wonderful site that gives formulas, alternate formulas, related sequences, and loads of article references on just about every sequence you could imagine. I just wonder what value we are are adding in our PM entries?

Is there a way to contect these articles together into some interesting theorems from number theory? Make these entries a more connected part of the theoretical and applied entires on PM?

I fear we could never out do the exposition and depth of the Sloan index if we wish to serve simply as a catalogue. If I were searching for integer sequences on-line I would probably prefer to be directed quickly to Sloans index and by-pass PM, no offense meant to PM and its users, unless PM's articles truly brought out deeper understanding.

I see PlanetMath and SloanE's OEIS as complementary. The OEIS has the actual numbers, while PlanetMath has the formulas neatly typeset.

PlanetMath is not necessarily the place for "deeper understanding." It seems better suited for poseurs like me. I can write a thousand page book on prime numbers in which I use up the entire Greek and Hebrew alphabets for constant or variable names and the only numeric literals are the page numbers. It takes a genius like Neil Sloane to be bold enough to publish a math book filled with numeric literals.

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