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A179973 as a simple table

na(n)
01
11
22
34
412
542
6216
71200
88664
966384
10612264
115910024
1266723384
13776642664
1410311400344
15141065450904
162153769250584
1733743736435864
18583781959921944
1910308436641381144
20198863818304824344
213914117125411211544
2283301822014343774744
231805447764831655109144

[1,1,2,4,12,42,216,1200,8664,66384,612264,5910024,
 66723384,776642664,10311400344,141065450904,
 2153769250584,33743736435864,583781959921944,
 10308436641381144,198863818304824344,
 3914117125411211544,83301822014343774744,
 1805447764831655109144]