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A275550 as a simple table

na(n)
01
11
22
310
472
5819
611772
7206572
84196352
996871525
102500050000
1171328400806
122229026605056
1375718793541895
142778001759096256
15109473473278652344
164611686020574871552
17206810065502975099529

[1,1,2,10,72,819,11772,206572,4196352,96871525,
 2500050000,71328400806,2229026605056,
 75718793541895,2778001759096256,
 109473473278652344,4611686020574871552,
 206810065502975099529]