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A055855 as a simple table

na(n)
00
11
210
364
4328
51462
65908
722180
878592
9265729
10864146
112719028
128316200
1324814832
1472453344
15207502016
16584094080
171618757120
184423347200
1911932579840
2031812874240
2183901227008
22219074805760
23566754967552

[0,1,10,64,328,1462,5908,22180,78592,265729,
 864146,2719028,8316200,24814832,72453344,
 207502016,584094080,1618757120,4423347200,
 11932579840,31812874240,83901227008,219074805760,
 566754967552]