Prime spiral

Autor:Lamberto Lamberti

The prime spiral, also known as Ulam's spiral, is a plot in which the positive integers are arranged in a spiral, with primes indicated in some way along the spiral. http://mathworld.wolfram.com/PrimeSpiral.html

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Intercepts in 3D
拼砌四邊形 - 工作紙
畫三角形
အခြေခံ data အခေါ်အဝေါ်များ
Luxembourg Symbol

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Dissecting Rectangles into Squares
Subtracting integers
Quadrilateral Diagonal Exploration
rotate 3464 tessellation

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