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A015442 as a simple table

n a(n)
0 0
1 1
2 1
3 8
4 15
5 71
6 176
7 673
8 1905
9 6616
10 19951
11 66263
12 205920
13 669761
14 2111201
15 6799528
16 21577935
17 69174631
18 220220176
19 704442593
20 2245983825
21 7177081976
22 22898968751
23 73138542583
24 233431323840
25 745401121921
26 2379420388801

[0,1,1,8,15,71,176,673,1905,6616,19951,66263,
 205920,669761,2111201,6799528,21577935,69174631,
 220220176,704442593,2245983825,7177081976,
 22898968751,73138542583,233431323840,745401121921,
 2379420388801]

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Last modified December 15 15:10 EST 2019. Contains 329999 sequences. (Running on oeis4.)