Higher-dimensional arrays?

[Jon Awbrey]

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you sometimes find these described as "tetrahedrons"
or "tetrahedral ararys", for example:

http://www.research.att.com/~njas/sequences/A056558
http://www.research.att.com/~njas/sequences/A056559
http://www.research.att.com/~njas/sequences/A056560

http://www.research.att.com/~njas/sequences/A112096
http://www.research.att.com/~njas/sequences/A112481
http://www.research.att.com/~njas/sequences/A113198
http://www.research.att.com/~njas/sequences/A113200

http://www.research.att.com/~njas/sequences/A124939

http://www.research.att.com/~njas/sequences/A127325
http://www.research.att.com/~njas/sequences/A127326
http://www.research.att.com/~njas/sequences/A127327

jon awbrey

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