The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A327412

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A327412

a(n) = multinomial(3*n+2; 2, 3, 3, ..., 3) (n times '3').
(history; published version)

#16 by Michel Marcus at Sat Feb 29 03:34:55 EST 2020

STATUS

reviewed

approved

#15 by Joerg Arndt at Sat Feb 29 03:07:04 EST 2020

STATUS

proposed

reviewed

#14 by Michel Marcus at Fri Feb 28 14:52:32 EST 2020

STATUS

editing

proposed

#13 by Michel Marcus at Fri Feb 28 14:52:29 EST 2020

NAME

a(n) = Multinomialmultinomial(3*n+2; 2, 3, 3, ..., 3) (n times '3').

STATUS

proposed

editing

#12 by F. Chapoton at Fri Feb 28 14:19:20 EST 2020

STATUS

editing

proposed

#11 by F. Chapoton at Fri Feb 28 14:19:12 EST 2020

PROG

def a(n): return multinomial([2] + [3] * n)

print [a(n) for n in range(15)]

STATUS

approved

editing

Discussion

Fri Feb 28

14:19

F. Chapoton: adapt sage code for py3

#10 by Peter Luschny at Sun Sep 08 02:23:28 EDT 2019

STATUS

proposed

approved

#9 by Joerg Arndt at Sun Sep 08 02:15:52 EDT 2019

STATUS

editing

proposed

#8 by Joerg Arndt at Sun Sep 08 02:15:01 EDT 2019

NAME

a(n) = Multinomial(3*n+2; 2, 3, 3, ..., 3) (n- times '3').

STATUS

proposed

editing

#7 by Alois P. Heinz at Sat Sep 07 14:53:56 EDT 2019

STATUS

editing

proposed

Discussion

Sat Sep 07

15:11

Peter Luschny: OK, I am fine with that. On the other hand I hate it this way when computing. For example as Maple does it. Just awkward and error-prone. I prefer the way Sage works and as I wrote it: given a list return the multinomial. 3*n+2 is an internal detail of this computation, nothing more.

15:22

Alois P. Heinz: another way to write it would be (2, 3, 3, ..., 3)!, see: http://mathworld.wolfram.com/MultinomialCoefficient.html

17:16

Peter Luschny: "Todays long-standing mathematical conventions have many, many defects, and I can think of dozens of cases where changes would improve the current situation and make it easier on all future mathematicians." D. E. Knuth