The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A034829 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A034829

a(n) = n-th sept-factorial number divided by 2.
(history; published version)

#40 by Michel Marcus at Mon Dec 19 03:45:20 EST 2022

STATUS

reviewed

approved

#39 by Joerg Arndt at Mon Dec 19 01:53:03 EST 2022

STATUS

proposed

reviewed

#38 by Amiram Eldar at Mon Dec 19 01:18:08 EST 2022

STATUS

editing

proposed

#37 by Amiram Eldar at Mon Dec 19 01:11:02 EST 2022

FORMULA

From Amiram Eldar, Dec 19 2022: (Start)

a(n) = A084947(n)/2.

Sum_{n>=1} 1/a(n) = 2*(e/7^5)^(1/7)*(Gamma(2/7) - Gamma(2/7, 1/7)). - _Amiram Eldar_, Dec 19 2022(End)

CROSSREFS

Cf. A045754, A034830, A034831, A034832, A034833, A034834, A084947.

#36 by Amiram Eldar at Mon Dec 19 01:09:43 EST 2022

LINKS

Peter Luschny, <a href="http://oeis.org/wiki/User:Peter_Luschny/Multifactorials">Multifactorials</a>.

<a href="/index/Fa#factorial">Index entries for sequences related to factorial numbers</a>.

#35 by Amiram Eldar at Mon Dec 19 01:09:15 EST 2022

FORMULA

Sum_{n>=1} 1/a(n) = 2*(e/7^5)^(1/7)*(Gamma(2/7) - Gamma(2/7, 1/7)). - Amiram Eldar, Dec 19 2022

STATUS

approved

editing

#34 by R. J. Mathar at Mon Feb 24 16:26:40 EST 2020

STATUS

editing

approved

#33 by R. J. Mathar at Mon Feb 24 16:26:29 EST 2020

FORMULA

D-finite with recurrence: a(n) +(-7*n+5)*a(n-1)=0. - R. J. Mathar, Feb 24 2020

STATUS

approved

editing

#32 by Susanna Cuyler at Sat Feb 24 09:24:21 EST 2018

STATUS

proposed

approved

#31 by Michel Marcus at Sat Feb 24 00:10:59 EST 2018

STATUS

editing

proposed