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A019447 as a simple table

na(n)
01
11
22
34
412
535
6120
7427
81628
96090
1023797
1190296
12350726
131338076
145165957
1519732508

[1,1,2,4,12,35,120,427,1628,6090,23797,90296,
 350726,1338076,5165957,19732508]