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A040025 as a simple table

na(n)
04
115
293
3668
45172
542042
6353701
73036643
827045226
9239093865
102158090933
1119742800564

[4,15,93,668,5172,42042,353701,3036643,27045226,
 239093865,2158090933,19742800564]