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A000313 formatted as a simple table:

n a(n)
4 1
5 4
6 30
7 220
8 1855
9 17304
10 177996
11 2002440
12 24474285
13 323060540
14 4581585866
15 69487385604
16 1122488536715
17 19242660629360
18 348933579412440
19 6673354706262864
20 134252194678935321
21 2834212998777523380

[1,4,30,220,1855,17304,177996,2002440,24474285,
 323060540,4581585866,69487385604,1122488536715,
 19242660629360,348933579412440,6673354706262864,
 134252194678935321,2834212998777523380]

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Last modified December 16 13:01 EST 2009. Contains 170825 sequences.


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