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A091217 as a simple table

na(n)
01
11
22
36
416
554
6232
71132
86024
936262
10242080
111775316
1214135584
13122077832
141131066448
1511230979624
16118638940864

[1,1,2,6,16,54,232,1132,6024,36262,242080,1775316,
 14135584,122077832,1131066448,11230979624,
 118638940864]