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A220457 as a simple table

na(n)
14
222
3108
4691
53872
620897
7112582
8605780
93249132
1017400206
1193125105
12498148634
132663790130
1414241169579
1576125716517
16406890173406
172174685548474
1811622471918192
1962113961444133
20331949857443568
211773988622548460

[4,22,108,691,3872,20897,112582,605780,3249132,
 17400206,93125105,498148634,2663790130,
 14241169579,76125716517,406890173406,
 2174685548474,11622471918192,62113961444133,
 331949857443568,1773988622548460]