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A209673 as a simple table

n a(n)
0 1
1 1
2 4
3 19
4 116
5 751
6 5552
7 43219
8 366088
9 3245311
10 30569012
11 299662672
12 3079276708
13 32773002718
14 362512238272
15 4136737592323
16 48773665308176
17 591313968267151
18 7375591544495636
19 94340754464144215
20 1237506718985945656
21 16608519982801477908
22 228013066931927465872

[1,1,4,19,116,751,5552,43219,366088,3245311,
 30569012,299662672,3079276708,32773002718,
 362512238272,4136737592323,48773665308176,
 591313968267151,7375591544495636,
 94340754464144215,1237506718985945656,
 16608519982801477908,228013066931927465872]

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Last modified January 17 18:44 EST 2019. Contains 319251 sequences. (Running on oeis4.)