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A117671 as a simple table

na(n)
01
16
235
3210
41287
58008
650388
7319770
82042975
913123110
1084672315
11548354040
123562467300
1323206929840
14151532656696
15991493848554
166499270398159
1742671977361650
18280576272201225

[1,6,35,210,1287,8008,50388,319770,2042975,
 13123110,84672315,548354040,3562467300,
 23206929840,151532656696,991493848554,
 6499270398159,42671977361650,280576272201225]