by Eric April 13, 2004
Get the Tetragrammaton Cleric mug.The {n}th tetrahedral number is the sum of the first n Triangular numbers. Triangular numbers are the sum of the first n integers (1, 3, 6, 10, 15, etc.), and taking the sum of the triangular numbers results in the tetrahedral numbers (1, 4, 10, 20, 35, etc.)
The fifth tetrahedral number is the sum of the first five triangular numbers. The first five triangular numbers are 1, 3=1+2, 6=1+2+3, 10=1+2+3+4, and 15=1+2+3+4+5, so the sum of these numbers is 1+3+6+10+15= 35.
by EmeraldofSeattle December 14, 2008
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by fvehtgrh November 6, 2003
Get the tetrahedracannabol mug.by Mr. Slartybartfest November 29, 2007
Get the tetrahedral mug.Terragen is a powerful landscape generating program, downloadable at http://planetside.co.uk/
Majority of 3D landscapes nowadays are made using this program. However, it's not so easy.
Majority of 3D landscapes nowadays are made using this program. However, it's not so easy.
"Terragen™ is capable of photorealistic results for professional landscape visualisation, special effects, art and recreation."
by _ronstyle November 8, 2008
Get the terragen mug.by fakesantaclaus December 6, 2012
Get the Titrage mug.I folded this square paper four times, then cut patterns and made a tetrametrical snowflake! How awesome!
by whitney and Berta December 8, 2012
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