[seqfan] 1/4 Pascal Triangle

franktaw at netscape.net franktaw at netscape.net
Tue May 18 07:46:26 CEST 2010

[First numerator and then denominator|First denominator and then 
numerator] of each element of the 1/4-Pascal triangle (by row).

It seems like every variant of these is present except the two that 
should be: "frac,tabl" sequences for the numerators and denominators.

These two in particular are wrong, since they have the "tabl" keyword, 
but the actual row lengths are 2n, not n. I'm not sure what to do with 
all these. Sequences relating to the 1/4 Pascal triangle continue up to 
A046600, at which point the 1/5 Pascal triangle kicks in. Please at 
least glance at what is in the database before making suggestions for 

Basic approaches that occur to me: eliminate all the sequences with 
numerator,denominator (or denominator,numerator) sequences, replacing 
them with separate numerator and denominator sequences (some of the 
denominator sequences already exist). Or fix the (tabl vs. tabf) 
keywords, and add separate numerator and denominator sequences. Or just 
fix the keywords and be done with it.

(This does not consider approaches that involve wholesale deletion of 
the associated sequences; I assume that such suggestions are 

Franklin T. Adams-Watters

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