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A198760 as a simple table

na(n)
22
38
432
5136
6596
72712
812642
960234
10291840
111434184
127130640
1335807114
14181339236
15925139186
164750176056
1724528421712
18127294780994
19663591911824
203473315219722
2118246162722278
2296169600405626
23508413199626078
242695245063006696
2514324688031734740

[2,8,32,136,596,2712,12642,60234,291840,1434184,
 7130640,35807114,181339236,925139186,4750176056,
 24528421712,127294780994,663591911824,
 3473315219722,18246162722278,96169600405626,
 508413199626078,2695245063006696,
 14324688031734740]