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A270406 as a simple table

na(n)
11
25
322
410
593
6167
7386
81720
9483
101586
1114065
1215018
136476
14100156
15258972
1656628
1726333
18649950
193288327
202668750
21106762
223944928
2334374186
2466449432
2512317877
26431910
2722764165
28313530000
291171704435
30792534015
311744436
32126264820
332583699888
3416476937840
3526225260226
364304016990

[1,5,22,10,93,167,386,1720,483,1586,14065,15018,
 6476,100156,258972,56628,26333,649950,3288327,
 2668750,106762,3944928,34374186,66449432,12317877,
 431910,22764165,313530000,1171704435,792534015,
 1744436,126264820,2583699888,16476937840,
 26225260226,4304016990]