Sequences from arrays
N. J. A. Sloane
njas at research.att.com
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="http://www.research.att.com/cgi-bin/access.cgi/as/njas/sequences/eisA.cgi?Anum=007318">
A007318</a> (Pascal's triangle),
<li><A HREF="http://www.research.att.com/cgi-bin/access.cgi/as/njas/sequences/eisA.cgi?Anum=008277">
A008277</a> (triangle of Stirling numbers of second kind),
<li><A HREF="http://www.research.att.com/cgi-bin/access.cgi/as/njas/sequences/eisA.cgi?Anum=011971">
A011971</a> (Aitken's array),
<li><A HREF="http://www.research.att.com/cgi-bin/access.cgi/as/njas/sequences/eisA.cgi?Anum=026300">
A026300</a> (Motzkin's triangle),
<li><A HREF="http://www.research.att.com/cgi-bin/access.cgi/as/njas/sequences/eisA.cgi?Anum=034851">
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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