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A005411 as a simple table

na(n)
01
11
24
325
4208
52146
626368
7375733
86092032
9110769550
102232792064
1149426061818
121192151302144
1331123028996164
14874428204384256
1526308967412122125
16843984969276915712
1728757604639850111894
181037239628039528906752
1939481325230750749160462

[1,1,4,25,208,2146,26368,375733,6092032,110769550,
 2232792064,49426061818,1192151302144,
 31123028996164,874428204384256,26308967412122125,
 843984969276915712,28757604639850111894,
 1037239628039528906752,39481325230750749160462]