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A088015 as a simple table

na(n)
01
10
24
36
420
540
6106
7238
8592
91392
103394
118118
1219664
1347320
14114370
15275806
16666112
171607520
183881410
199369318
2022620560
2154608392
22131838370
23318281038
24768402496
251855077840
264478562274
2710812186006
2826102942480
2963018038200

[1,0,4,6,20,40,106,238,592,1392,3394,8118,19664,
 47320,114370,275806,666112,1607520,3881410,
 9369318,22620560,54608392,131838370,318281038,
 768402496,1855077840,4478562274,10812186006,
 26102942480,63018038200]