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A108490 formatted as a simple table:

n a(n)
0 1
1 2
2 10
3 56
4 268
5 1448
6 7864
7 42752
8 236368
9 1313696
10 7339552
11 41217920
12 232321984
13 1313731712
14 7449834880
15 42347380736
16 241225384192
17 1376662561280
18 7869527190016
19 45051709749248
20 258256281078784
21 1482218578159616

[1,2,10,56,268,1448,7864,42752,236368,1313696,
 7339552,41217920,232321984,1313731712,7449834880,
 42347380736,241225384192,1376662561280,
 7869527190016,45051709749248,258256281078784,
 1482218578159616]

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Last modified November 29 12:46 EST 2009. Contains 167659 sequences.


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