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Notamathematician
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Top posts

12
Number of integer solutions of $n = \operatorname{lcm}(x,y) - \gcd(x,y)$ with $1 \leqslant y < x \leqslant n$
Dec 13, 2025
4
Fast and simple recurrence for sums over powers and factorials
Dec 14, 2025
3
Recurrence for expansion of EGF $\frac{\exp(x)}{\cos(x)-\sin(x)}$
Dec 11, 2025
3
Pair of identities for A125790
Jan 6
3
Smallest $q$ such that $((2n+1)(2^m-1))\mid(2^q-1)$ with specific $m$
Jan 22
2
Proof of a recurrent formula if the closed form is known
Dec 8, 2025
1
Recurrence for columns of A125790
Dec 12, 2025
1
Conjecture on a multiplicative order (A002326)
Jan 10
1
Permutation of natural numbers to enumerate partitions using the binary expansion
Jan 26
0
Closed form for A179382
15 hours ago