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#28 by Susanna Cuyler at Fri Aug 16 07:49:52 EDT 2019
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#27 by Joerg Arndt at Fri Aug 16 07:32:48 EDT 2019
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#26 by Gus Wiseman at Fri Aug 16 00:43:04 EDT 2019
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#25 by Gus Wiseman at Thu Aug 15 08:30:45 EDT 2019
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#24 by N. J. A. Sloane at Tue Dec 25 22:35:58 EST 2018
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| REFERENCES
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Miklos Bona, editor, Handbook of Enumerative Combinatorics, CRC Press, 2015, p. 404.
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Discussion
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| Tue Dec 25
| 22:35
| OEIS Server: https://oeis.org/edit/global/2780
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#23 by Joerg Arndt at Mon Sep 10 02:40:24 EDT 2018
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#22 by Michel Marcus at Mon Sep 10 01:13:33 EDT 2018
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#21 by Andrew Howroyd at Sun Sep 09 19:35:50 EDT 2018
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#20 by Andrew Howroyd at Sun Sep 09 18:56:33 EDT 2018
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| PROG
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(PARI) seq(n)={Vec(serlaplace(1 + x^2/2 + log(sum(k=0, n, 2^binomial(k, 2)*(x*exp(-x + O(x^n)))^k/k!))))} \\ Andrew Howroyd, Sep 09 2018
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| STATUS
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approved
editing
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#19 by Alois P. Heinz at Fri Oct 27 09:05:52 EDT 2017
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