The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A001525 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A001525

a(n) = (3n)!/(3!n!).
(history; published version)

#25 by Hugo Pfoertner at Wed Feb 02 04:00:45 EST 2022

STATUS

reviewed

approved

#24 by Michel Marcus at Wed Feb 02 00:36:33 EST 2022

STATUS

proposed

reviewed

#23 by Jon E. Schoenfield at Tue Feb 01 23:43:15 EST 2022

STATUS

editing

proposed

#22 by Jon E. Schoenfield at Tue Feb 01 23:43:13 EST 2022

NAME

a(n) = (3n)!/(3!n!).

CROSSREFS

Equals A064350/3!, row sums of A157704/3! and row sums of A157705/3!.

AUTHOR

N. J. A. Sloane.

EXTENSIONS

More terms from _Harvey P. Dale, _, May 25 2011.

STATUS

approved

editing

#21 by Charles R Greathouse IV at Sun Aug 03 14:31:46 EDT 2014

MATHEMATICA

Table[(3 n)!/(3! n!), {n, 20}] (* _Harvey P. Dale, _, May 25 2011 *)

Discussion

Sun Aug 03

14:31

OEIS Server: https://oeis.org/edit/global/2276

#20 by T. D. Noe at Thu Aug 09 13:16:25 EDT 2012

STATUS

editing

approved

#19 by T. D. Noe at Thu Aug 09 13:16:07 EDT 2012

LINKS

T. D. Noe, <a href="/A001525/b001525.txt">Table of n, a(n) for n = 1..100</a>

MATHEMATICA

Table[(3# n)!/(3!# n!)&/@Range[15, {n, 20}] (* From Harvey P. Dale, May 25 2011 *)

CROSSREFS

Contribution from _Johannes W. Meijer_, Mar 07 2009: Equals A064350/3!, row sums of A157704/3! and row sums of A157705/3!

STATUS

approved

editing

#18 by Russ Cox at Fri Mar 30 18:59:41 EDT 2012

CROSSREFS

Contribution from _Johannes W. Meijer (meijgia(AT)hotmail.com), _, Mar 07 2009: Equals A064350/3!, row sums of A157704/3! and row sums of A157705/3!

Discussion

Fri Mar 30

18:59

OEIS Server: https://oeis.org/edit/global/295

#17 by Russ Cox at Fri Mar 30 16:43:05 EDT 2012

AUTHOR

_N. J. A. Sloane (njas(AT)research.att.com)_.

Discussion

Fri Mar 30

16:43

OEIS Server: https://oeis.org/edit/global/110

#16 by Harvey P. Dale at Wed May 25 08:48:05 EDT 2011

STATUS

proposed

approved