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A188312 as a simple table

na(n)
01
11
24
312
445
5174
6709
72978
812825
956303
10251060
111133943
125176926
1323851690
14110759081
15517853840
162435786531
1711517940357
1854722081630
19261089977806
201250479470053
216009884614944
2228975052979797
23140098515402139
24679189779433800
253300702453217325
2616076773046682690

[1,1,4,12,45,174,709,2978,12825,56303,251060,
 1133943,5176926,23851690,110759081,517853840,
 2435786531,11517940357,54722081630,261089977806,
 1250479470053,6009884614944,28975052979797,
 140098515402139,679189779433800,3300702453217325,
 16076773046682690]