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use a sage function for polygonal numbers

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filifa 2025-04-19 20:42:09 -04:00
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notebooks/problem0012.ipynb
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@ -7,7 +7,7 @@
"source": [
"# [Highly Divisible Triangular Number](https://projecteuler.net/problem=12)\n",
"\n",
"Yet another problem with a straightforward solution thanks to SageMath's preinstalled functions. We'll also once again apply the closed formula for triangle numbers (see [problem 1](https://projecteuler.net/problem=1))."
"Yet another problem with a straightforward solution thanks to SageMath's preinstalled functions. Triangular numbers fall into the broader category of [polygonal numbers](https://en.wikipedia.org/wiki/Polygonal_number)."
]
},
{
@ -26,7 +26,7 @@
],
"source": [
"for n in PositiveIntegers():\n",
" t = n * (n+1) / 2\n",
" t = polygonal_number(3, n)\n",
" if number_of_divisors(t) > 500:\n",
" print(t)\n",
" break"