A028377, A028378

[Meeussen Wouter (bkarnd)]

it should point to A028376 or A028364
Triangle read by rows: T(n,m) = Sum Catalan(n-k)*Catalan(k), k=0..m.
0,1,0,1,2,0,2,3,5,0,5,7,9,14,0,14,19,23,28,42,0,42

the zeros (now) look erroneous,
the formula produces the same as A028364 :

T(n,m) = Sum Catalan(n-k)*Catalan(k), k=0..m	
{1}	
{1, 2}	
{2, 3, 5}	
{5, 7, 9, 14}	
{14, 19, 23, 28, 42}	
{42, 56, 66, 76, 90, 132}	

W.



> -----Original Message-----
> From: Gordon Royle [mailto:gordon at csse.uwa.edu.au]
> Sent: vrijdag 30 april 2004 8:08
> To: seqfan at ext.jussieu.fr
> Subject: A028377, A028378
> 
> 
> Can anyone interpret these two sequences for me please...
> 
> The description of A028378 (which arose from a search I did with 
> 1,2,3,5,7,9,14) is
> 
> "concatenate rows of triangle in A028377"
> 
> The description of A028377 however is the expansion of a certain 
> infinite product in a single variable (presumably a 
> generating function 
> for something interesting?)
> 
> In particular, A028377 does not have a triangle.... or at 
> least not in 
> the usual sense like Pascal's triangle.
> 
> Secondly, even if A028377 is a typo and somewhere there is a triangle 
> involved, what does "concatenate" mean... sum? or concatenate the 
> decimal string representations of the numbers...?
> 
> Thanks
> 
> Gordon
> 
> 


===============================
This email is confidential and intended solely for the use of the individual to whom it is addressed. 
If you are not the intended recipient, be advised that you have received this email in error and that any use, dissemination, forwarding, printing, or copying of this email is strictly prohibited.
You are explicitly requested to notify the sender of this email that the intended recipient was not reached.