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A147009 as a simple table

na(n)
11
21
31
41
51
61
71
83
96
1013
1120
1235
1374
14191
15479
161455
174033
1812735
1940335
20153380
21583871

[1,1,1,1,1,1,1,3,6,13,20,35,74,191,479,1455,4033,
 12735,40335,153380,583871]