centered triangular number
Sign in to savecentered figurate number that represents a triangle with a dot in the center and all other dots surrounding the center in successive triangular layers
Connections
figurate number
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centered polygonal number
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International Standard Book Number
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19
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31
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dimension
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46
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equilateral triangle
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64
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three-dimensional space
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85
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109
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square number
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magic square
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136
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triangular number
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199
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166
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four-dimensional space
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On-Line Encyclopedia of Integer Sequences
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