Andi Fugard on Nostr: 2025 is a square number. That last happened in 1936 and next happens in 91 years. ...
2025 is a square number. That last happened in 1936 and next happens in 91 years.
44² = 1936
45² = 2025
46² = 2116
There’s a nice recursive relationship:
n² = (n − 1)² + (2n − 1)
The picture might help explain why: n little squares go on the two sides; lop one off where they overlap.
Published at
2024-12-30 22:38:35Event JSON
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