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A062561 formatted as a simple table:

n a(n)
0 0
1 3
2 12
3 45
4 168
5 630
6 2376
7 9009
8 34320
9 131274
10 503880
11 1939938
12 7488432
13 28973100
14 112326480
15 436268025
16 1697168160
17 6611884290
18 25792489800
19 100734001830
20 393847225200
21 1541374822260
22 6037849200240
23 23671113341850

[0,3,12,45,168,630,2376,9009,34320,131274,503880,
 1939938,7488432,28973100,112326480,436268025,
 1697168160,6611884290,25792489800,100734001830,
 393847225200,1541374822260,6037849200240,
 23671113341850]

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Last modified December 4 08:07 EST 2009. Contains 170310 sequences.


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