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filifa
2025-07-24 23:08:19 -04:00
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notebooks/problem0028.ipynb
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"Side note: this practice of writing the natural numbers in a spiral, combined with marking the prime numbers, has been coined the [Ulam spiral](https://en.wikipedia.org/wiki/Ulam_spiral). Somewhat interestingly, lots of primes appear in vertical, horizontal, and diagonal lines when laid out this way.\n",
"\n",
"## Relevant sequences\n",
"* Numbers on diagonals: [A200975](https://oeis.org/A200975)"
"* Numbers on diagonals: [A200975](https://oeis.org/A200975)\n",
"\n",
"#### Copyright (C) 2025 filifa\n",
"\n",
"This work is licensed under the [Creative Commons Attribution-ShareAlike 4.0 International license](https://creativecommons.org/licenses/by-sa/4.0/) and the [BSD Zero Clause license](https://spdx.org/licenses/0BSD.html)."
]
}
],