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A151528 as a simple table

na(n)
11
22
36
416
548
6158
7508
81708
95787
1019901
1168974
12241240
13848449
143001597
1510666729
1638065825
17136329386

[1,2,6,16,48,158,508,1708,5787,19901,68974,241240,
 848449,3001597,10666729,38065825,136329386]