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A221484 as a simple table

na(n)
10
24
38
473
5292
61713
78235
843733
9220672
101142790
115840082
1230047605
13154064032
14791329272
154060908537
1620849136414
17107016685715
18549372170263
192820041046796
2014476302849381
2174310986678816
22381462539353767

[0,4,8,73,292,1713,8235,43733,220672,1142790,
 5840082,30047605,154064032,791329272,4060908537,
 20849136414,107016685715,549372170263,
 2820041046796,14476302849381,74310986678816,
 381462539353767]