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A188497 as a simple table

na(n)
00
10
22
34
47
520
672
7240
8722
92140
106508
1120077
1261776
13189056
14577856
151768380
165416230
1716587984
1850788707
19155489884
20476058864
211457605616
224462928950
2313664497400
2441837412392
25128096408137
26392202398144
271200835918016
283676688064688

[0,0,2,4,7,20,72,240,722,2140,6508,20077,61776,
 189056,577856,1768380,5416230,16587984,50788707,
 155489884,476058864,1457605616,4462928950,
 13664497400,41837412392,128096408137,392202398144,
 1200835918016,3676688064688]