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A000736 as a simple table

n a(n)
0 1
1 2
2 4
3 10
4 32
5 120
6 513
7 2455
8 13040
9 76440
10 492231
11 3465163
12 26530503
13 219754535
14 1959181266
15 18710532565
16 190588702776
17 2062664376064
18 23636408157551
19 285900639990875
20 3640199365715769
21 48665876423760247

[1,2,4,10,32,120,513,2455,13040,76440,492231,
 3465163,26530503,219754535,1959181266,18710532565,
 190588702776,2062664376064,23636408157551,
 285900639990875,3640199365715769,
 48665876423760247]

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Last modified February 17 18:27 EST 2018. Contains 299296 sequences. (Running on oeis4.)