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A345074 a(n) is the largest integer k such that A345073(k) = n. 1

%I #12 Jun 13 2021 03:22:58

%S 3,54,458,3480,25867,191351,1414204,10450027,77216338

%N a(n) is the largest integer k such that A345073(k) = n.

%H David E. Radford, <a href="https://arxiv.org/abs/2106.02002">Factorials and powers, a minimality result</a>, arXiv:2106.02002 [math.NT], 2021.

%H David E. Radford, <a href="https://arxiv.org/abs/2106.02109">Factorials and powers, a minimality result, revisited</a>, arXiv:2106.02109 [math.NT], 2021. See p. 10.

%o (PARI) f(n) = my(k=1); while (exp(1)*sqrtn(n!, n) >= n+k, k++); k; \\ A345073

%o lista(nn) = {my(m=2, nm); for (n=2, nn, nm = f(n); if (nm > m, m = nm; print1(n-1, ", ")););}

%Y Cf. A001113 (e), A345073.

%K nonn,hard,more

%O 2,1

%A _Michel Marcus_, Jun 07 2021

%E Offset changed to 2 and a(8)-a(10) from _Jinyuan Wang_, Jun 13 2021

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Last modified April 25 10:51 EDT 2024. Contains 371967 sequences. (Running on oeis4.)