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#40 by Charles R Greathouse IV at Thu Sep 08 08:45:37 EDT 2022
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(MAGMAMagma) I:=[1, 6]; [0] cat [n le 2 select I[n] else 6*Self(n-1)+(2*n-1)^2*Self(n-2): n in [1..30]]; // Vincenzo Librandi, Feb 20 2015
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Discussion
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| Thu Sep 08
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| OEIS Server: https://oeis.org/edit/global/2944
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#39 by Wolfdieter Lang at Wed Aug 28 15:14:25 EDT 2019
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#38 by Wolfdieter Lang at Wed Aug 28 15:14:22 EDT 2019
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Wolfdieter Lang, <a href="/A142970/a142970_1.text.txt">Approximants for Pi-3 and more.</a>
L. J. Lange, <a href="http://www.jstor.org/stable/2589152">An Elegant Continued Fraction for π</a>, The American Mathematical Monthly, 106 (1999), 456-458.
L. J. Lange, <a href="http://www.jstor.org/stable/2589152">An Elegant Continued Fraction for π</a>, The American Mathematical Monthly, 106 (1999), 456-458.
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#37 by Wolfdieter Lang at Wed Aug 28 15:13:36 EDT 2019
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Wolfdieter Lang, <a href="/A142970/a142970_1.txt">Approximants for Pi-3 and more</a>
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| STATUS
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approved
editing
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#36 by Michel Marcus at Tue Aug 27 10:02:44 EDT 2019
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#35 by Joerg Arndt at Tue Aug 27 08:23:05 EDT 2019
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#34 by Wolfdieter Lang at Mon Aug 26 13:23:22 EDT 2019
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#33 by Wolfdieter Lang at Mon Aug 26 13:22:44 EDT 2019
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L. J. Lange, <a href="http://www.jstor.org/stable/2589152">An Elegant Continued Fraction for π</a>, The American Mathematical Monthly, 106 (1999), 456-458.
L. J. Lange, <a href="http://www.jstor.org/stable/2589152">An Elegant Continued Fraction for π</a>, The American Mathematical Monthly, 106 (1999), 456-458.
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#32 by Wolfdieter Lang at Mon Aug 26 13:21:57 EDT 2019
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Wolfdieter Lang, <a href="/A142970/a142970.text.txt">Approximants for Pi-3 and more.</a>
Wolfdieter Lang, <a href="/A142970/a142970_1.text.txt">Approximants for Pi-3 and more.</a>
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approved
editing
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#31 by Wolfdieter Lang at Sun Aug 25 12:36:25 EDT 2019
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