Logo

A049403 formatted as a triangular array:

1
1 1
0 3 1
0 3 6 1
0 0 15 10 1
0 0 15 45 15 1
0 0 0 105 105 21 1
0 0 0 105 420 210 28 1
0 0 0 0 945 1260 378 36 1
0 0 0 0 945 4725 3150 630 45 1
0 0 0 0 0 10395 17325 6930 990 55 1

A049403 formatted as a square array:

1 1 0 0 0 0 0 0 0 0 0
1 3 3 0 0 0 0 0 0 0
1 6 15 15 0 0 0 0 0
1 10 45 105 105 0 0 0
1 15 105 420 945 945 0
1 21 210 1260 4725 10395
1 28 378 3150 17325
1 36 630 6930
1 45 990
1 55
1

A049403 formatted as an upper right triangle:

1 1 0 0 0 0 0 0 0 0 0
1 3 3 0 0 0 0 0 0 0
1 6 15 15 0 0 0 0 0
1 10 45 105 105 0 0 0
1 15 105 420 945 945 0
1 21 210 1260 4725 10395
1 28 378 3150 17325
1 36 630 6930
1 45 990
1 55
1

Lookup | Welcome | Find friends | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
More pages | Superseeker | Maintained by N. J. A. Sloane (njas@research.att.com)

Last modified December 6 22:55 EST 2009. Contains 170429 sequences.


AT&T Labs Research