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A032295 as a simple table

n a(n)
1 4
2 6
3 16
4 45
5 132
6 404
7 1296
8 4380
9 15064
10 53622
11 192696
12 703895
13 2589300
14 9606744
15 35824088
16 134297280
17 505421340
18 1909194056
19 7234153416
20 27489073899
21 104717489748
22 399827555604
23 1529763696816

[4,6,16,45,132,404,1296,4380,15064,53622,192696,
 703895,2589300,9606744,35824088,134297280,
 505421340,1909194056,7234153416,27489073899,
 104717489748,399827555604,1529763696816]

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Last modified December 21 16:29 EST 2014. Contains 252324 sequences.