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A048990 as a simple table

n a(n)
0 1
1 2
2 14
3 132
4 1430
5 16796
6 208012
7 2674440
8 35357670
9 477638700
10 6564120420
11 91482563640
12 1289904147324
13 18367353072152
14 263747951750360
15 3814986502092304
16 55534064877048198
17 812944042149730764
18 11959798385860453492
19 176733862787006701400

[1,2,14,132,1430,16796,208012,2674440,35357670,
 477638700,6564120420,91482563640,1289904147324,
 18367353072152,263747951750360,3814986502092304,
 55534064877048198,812944042149730764,
 11959798385860453492,176733862787006701400]

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Last modified February 23 23:56 EST 2018. Contains 299595 sequences. (Running on oeis4.)