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A331339 as a simple table

na(n)
01
11
25
332
4292
53294
644918
7714468
813002456
9266275200
106060498672
11151750887936
124145522908272
13122690391196944
143910569680464848
15133549150323123744
164864927063250290176
17188297220693251438208
187716800776602560577408

[1,1,5,32,292,3294,44918,714468,13002456,
 266275200,6060498672,151750887936,4145522908272,
 122690391196944,3910569680464848,
 133549150323123744,4864927063250290176,
 188297220693251438208,7716800776602560577408]