12 lines
373 B
Python
12 lines
373 B
Python
#!/usr/bin/env python3
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TESTS = (4, 3, 5, 6, 111, 222, 3333, 4444, 55555, 666666, 7777777, 88888888,
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999999999, 123456789123456789, 1000000000000000000)
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# Fomular from http://mathworld.wolfram.com/TriangleTiling.html
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n = lambda a: a * (a + 2) * (a * 2 + 1) // 8 % 2016
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with open('TRIGRID.TXT', 'w') as f:
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for a in TESTS:
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f.write("{}\n".format(n(a)))
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