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A091146 as a simple table

na(n)
01
10
21
33
416
5162
62004
729676
8511660
910077696
10223416176
115508996067
12149620408779
134439426853025
14142915981606747
154962277770372786
16184884258895036416
177358499526831141011
18311624392527600238320
1913992684008957401915051
20664101403687644955591709

[1,0,1,3,16,162,2004,29676,511660,10077696,
 223416176,5508996067,149620408779,4439426853025,
 142915981606747,4962277770372786,
 184884258895036416,7358499526831141011,
 311624392527600238320,13992684008957401915051,
 664101403687644955591709]