## Monday, January 16, 2017

### Ulam spiral on triangle on hexagonal grid

Ulam spiral on triangle on hexagonal grid transformed by 12 symmetries and added. Black is no primes, white is 8 primes. Note the many stars embedded in the hexagon.

## Sunday, January 15, 2017

### Ulam spiral on triangle on hexagonal grid

Ulam spiral on triangle on hexagonal grid transformed through 12 symmetries and added, and a color scheme chosen to represent the number of primes. White is 9 primes, yellow 8, purple 7...

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