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A300461 as a simple table

na(n)
10
24
38
428
5142
6540
72585
811343
951501
10233028
111052448
124769842
1321579345
1497715668
15442378911
162002838338
179067930634
1841054700887
19185876096558
20841553822832
213810142997823
2217250454214015
2378101569076062

[0,4,8,28,142,540,2585,11343,51501,233028,1052448,
 4769842,21579345,97715668,442378911,2002838338,
 9067930634,41054700887,185876096558,841553822832,
 3810142997823,17250454214015,78101569076062]