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A318609 as a simple table

n a(n)
1 2
2 4
3 6
4 24
5 90
6 252
7 702
8 2160
9 6642
10 19764
11 58806
12 176904
13 532170
14 1595052
15 4780782
16 14346720
17 43053282
18 129146724
19 387400806
20 1162241784
21 3486843450
22 10460412252
23 31380882462
24 94143001680
25 282430067922
26 847289140884
27 2541864234006
28 7625595890664
29 22876797237930

[2,4,6,24,90,252,702,2160,6642,19764,58806,176904,
 532170,1595052,4780782,14346720,43053282,
 129146724,387400806,1162241784,3486843450,
 10460412252,31380882462,94143001680,282430067922,
 847289140884,2541864234006,7625595890664,
 22876797237930]

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Last modified July 23 19:17 EDT 2021. Contains 346259 sequences. (Running on oeis4.)