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A169261 as a simple table

na(n)
01
18
256
3392
42744
519208
6134456
7941192
86588344
946118408
10322828856
112259801992
1215818613944
13110730297608
14775112083256
155425784582792
1637980492079544
17265863444556808
181861044111897656
1913027308783283592

[1,8,56,392,2744,19208,134456,941192,6588344,
 46118408,322828856,2259801992,15818613944,
 110730297608,775112083256,5425784582792,
 37980492079544,265863444556808,1861044111897656,
 13027308783283592]