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A321677 as a simple table

na(n)
01
10
21
31
44
54
616
722
870
9132
10375
11848
122428
136256
1418333
1552560
16161436
17500887
181624969
195384625
2018438815
2164674095
22233062429
23859831186
243248411250
2512545820860
2649508089411
27199410275018
28819269777688
293430680180687
3014633035575435
3163535672197070

[1,0,1,1,4,4,16,22,70,132,375,848,2428,6256,18333,
 52560,161436,500887,1624969,5384625,18438815,
 64674095,233062429,859831186,3248411250,
 12545820860,49508089411,199410275018,819269777688,
 3430680180687,14633035575435,63535672197070]