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A129549 formatted as a simple table:

n a(n)
1 1
2 3
3 20
4 78
5 352
6 1365
7 5232
8 18271
9 60598
10 187296
11 548020
12 1515265
13 3991204
14 10035401
15 24210308
16 56188768
17 125904351
18 273044682
19 574635828
20 1176027747
21 2345376048
22 4565886531
23 8691118644
24 16198834634
25 29602895824
26 53105875363

[1,3,20,78,352,1365,5232,18271,60598,187296,
 548020,1515265,3991204,10035401,24210308,56188768,
 125904351,273044682,574635828,1176027747,
 2345376048,4565886531,8691118644,16198834634,
 29602895824,53105875363]

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Last modified November 30 13:13 EST 2009. Contains 167758 sequences.


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