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A197406 as a simple table

na(n)
19
2227
31626
425621
5356211
64499426
760334353
8801294395
910631272297
10141478252511
111877225887699
1224928405579380
13331380977085358
144402455983432465
1558475570189400714
16776864156510384965

[9,227,1626,25621,356211,4499426,60334353,
 801294395,10631272297,141478252511,1877225887699,
 24928405579380,331380977085358,4402455983432465,
 58475570189400714,776864156510384965]