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A245904 as a simple table

n a(n)
1 1
2 2
3 6
4 22
5 84
6 330
7 1308
8 5210
9 20796
10 83100
11 332232
12 1328598
13 5313732
14 21253620
15 85011864
16 340042246
17 1360158564

[1,2,6,22,84,330,1308,5210,20796,83100,332232,
 1328598,5313732,21253620,85011864,340042246,
 1360158564]

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Last modified January 24 07:18 EST 2020. Contains 331189 sequences. (Running on oeis4.)