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A195440 as a simple table

na(n)
11
21
34
421
5134
6968
77662
865135
9587040
105559342
1154965230
12564651110
136004908296
1465920345700
15745289233564
168661959227407
17103330815828292
181263608418272768
1915823268263301680
20202712359166886406
212654710188935753950
2235514167158635839770

[1,1,4,21,134,968,7662,65135,587040,5559342,
 54965230,564651110,6004908296,65920345700,
 745289233564,8661959227407,103330815828292,
 1263608418272768,15823268263301680,
 202712359166886406,2654710188935753950,
 35514167158635839770]