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#48 by N. J. A. Sloane at Sat May 18 14:53:30 EDT 2024
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#47 by Stefano Spezia at Sat May 18 06:59:35 EDT 2024
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#46 by Stefano Spezia at Sat May 18 06:50:52 EDT 2024
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| FORMULA
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E.g.f.: 1 - 6*exp(x)*(exp(x) - 1). - Stefano Spezia, May 18 2024
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| KEYWORD
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nonn,easy
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| STATUS
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approved
editing
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#45 by Charles R Greathouse IV at Thu Sep 08 08:45:05 EDT 2022
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| PROG
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(MAGMAMagma) [1] cat [6*(2^(n-1)-1): n in [2..40]]; // Vincenzo Librandi, Feb 20 2016
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Discussion
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| Thu Sep 08
| 08:45
| OEIS Server: https://oeis.org/edit/global/2944
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#44 by Michel Marcus at Sat Jun 05 01:46:29 EDT 2021
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#43 by Joerg Arndt at Sat Jun 05 01:45:56 EDT 2021
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#42 by Jon E. Schoenfield at Fri Jun 04 23:01:54 EDT 2021
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#41 by Jon E. Schoenfield at Fri Jun 04 23:01:52 EDT 2021
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| COMMENTS
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Equals inverse binomial transform of A091344: (1, 7, 31, 115, 391,...)., ...).
Equals binomial transform of (1, 5, 7, 5, 7, 5,...). (, ...). (End)
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| FORMULA
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a(1)=1, a(2)=6, a(3)=18, a(n) = 3*a(n-1) - 2*a(n-2); a(1)=1, a(2). - _)=6, a(3)=18. - _Harvey P. Dale_, Nov 27 2011
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| STATUS
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approved
editing
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#40 by N. J. A. Sloane at Wed Dec 23 19:54:11 EST 2020
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#39 by Michel Marcus at Sat Nov 21 01:00:18 EST 2020
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