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A121910 as a simple table

na(n)
11
21
31
41
51
62
75
829
9869
10756029
11285790302433
1216335219393063437264866
139201358366190200404401435237110861938769705

[1,1,1,1,1,2,5,29,869,756029,285790302433,
 16335219393063437264866,
 9201358366190200404401435237110861938769705]