Created
April 17, 2018 13:40
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| from math import sqrt | |
| def isPentagonal(n): | |
| return (1/6*(sqrt(24*n+1)+1)).is_integer() | |
| i = 40756 | |
| while True: | |
| h = i*(2*i-1) | |
| if (isPentagonal(h)): | |
| print(h) | |
| break; | |
| i+=1 |
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