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A377859 as a simple table

na(n)
01
10
21
32
421
5144
61765
721552
8340137
95845760
10116495721
112550320640
1262023290109
131642735460352
1447321500546125
151469008742856704
1648962556079079505
171742660440701861888
1865993849612007279697
192648999558505185280000
20112360563741545020804581

[1,0,1,2,21,144,1765,21552,340137,5845760,
 116495721,2550320640,62023290109,1642735460352,
 47321500546125,1469008742856704,48962556079079505,
 1742660440701861888,65993849612007279697,
 2648999558505185280000,112360563741545020804581]