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A120920 as a simple table

na(n)
01
13
212
355
4276
51464
68058
745543
8262626
91538607
109130446
1154761628
12331403447
132021021082
1412407102937
1576611488305
16475493441604
172964664310319
1818560063203353
19116621922800283
20735236268006654

[1,3,12,55,276,1464,8058,45543,262626,1538607,
 9130446,54761628,331403447,2021021082,12407102937,
 76611488305,475493441604,2964664310319,
 18560063203353,116621922800283,735236268006654]