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A020474 formatted as a triangular array:

1
0 1
0 1 2
0 0 2 4
0 0 1 5 9
0 0 0 3 12 21
0 0 0 1 9 30 51
0 0 0 0 4 25 76 127
0 0 0 0 1 14 69 196 323
0 0 0 0 0 5 44 189 512 835
0 0 0 0 0 1 20 133 518 1353 2188
0 0 0 0 0 0 6 70 392 1422 3610 5798

A020474 formatted as a square array:

1 0 0 0 0 0 0 0 0 0 0 0
1 1 0 0 0 0 0 0 0 0 0
2 2 1 0 0 0 0 0 0 0
4 5 3 1 0 0 0 0 0
9 12 9 4 1 0 0 0
21 30 25 14 5 1 0
51 76 69 44 20 6
127 196 189 133 70
323 512 518 392
835 1353 1422
2188 3610
5798

A020474 formatted as an upper right triangle:

1 0 0 0 0 0 0 0 0 0 0 0
1 1 0 0 0 0 0 0 0 0 0
2 2 1 0 0 0 0 0 0 0
4 5 3 1 0 0 0 0 0
9 12 9 4 1 0 0 0
21 30 25 14 5 1 0
51 76 69 44 20 6
127 196 189 133 70
323 512 518 392
835 1353 1422
2188 3610
5798

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Last modified December 17 19:39 EST 2009. Contains 170821 sequences.


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