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A010909 as a simple table

na(n)
04
125
2156
3973
46069
537855
6236118
71472770
89186303
957298942
10357398265
112229247441
1213904779737
1386730120658
14540973246008
153374283935917
1621046867223484
17131278407014845
18818840161120305
195107459975407127
2031857435234607602
21198708591866413654

[4,25,156,973,6069,37855,236118,1472770,9186303,
 57298942,357398265,2229247441,13904779737,
 86730120658,540973246008,3374283935917,
 21046867223484,131278407014845,818840161120305,
 5107459975407127,31857435234607602,
 198708591866413654]