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A049368 as a simple table

na(n)
11
21
31
43
56
618
755
8230
91063
106161
1141004
12312782
132618995
1423549346
15222764216

[1,1,1,3,6,18,55,230,1063,6161,41004,312782,
 2618995,23549346,222764216]