Sequences from arrays

N. J. A. Sloane njas at
Sat Jul 10 02:01:05 CEST 1999

Thanks to Antti Karttunen, there's a new feature on the sequence
pages -- if you retrieve a sequence that's based on an array

[ in the way that Pascal's triangle gives the sequence 1 1 1 1 2 1 1 3 3 1 1 4 6 4 1 ...]

then by clicking on the keyword "tabl", you get to see the two-dimensional
array that produced the sequence.  

It won't work properly in every case yet, but please give it a test!

Try the following sequences, for example:

<li><A HREF="">
A007318</a> (Pascal's triangle),
<li><A HREF="">
A008277</a> (triangle of Stirling numbers of second kind),
<li><A HREF="">
A011971</a> (Aitken's array),
<li><A HREF="">
A026300</a> (Motzkin's triangle),
<li><A HREF="">
A034851</a> (Losanitsch's triangle).

Comments will be welcomed.  It's not yet in final form.

Thank you, Antti!

Neil Sloane

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