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A055841 as a simple table

na(n)
01
12
29
336
4144
5576
62304
79216
836864
9147456
10589824
112359296
129437184
1337748736
14150994944
15603979776
162415919104
179663676416
1838654705664
19154618822656
20618475290624
212473901162496
229895604649984
2339582418599936
24158329674399744
25633318697598976
262533274790395904
2710133099161583616
2840532396646334464
29162129586585337856
30648518346341351424

[1,2,9,36,144,576,2304,9216,36864,147456,589824,
 2359296,9437184,37748736,150994944,603979776,
 2415919104,9663676416,38654705664,154618822656,
 618475290624,2473901162496,9895604649984,
 39582418599936,158329674399744,633318697598976,
 2533274790395904,10133099161583616,
 40532396646334464,162129586585337856,
 648518346341351424]