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A225524 as a simple table

na(n)
01
12
28
324
466
5184
6488
71248
83136
97776
1018780
1144880
12105896
13246124
14567008
151293840
162920626
176545352
1814555388
1932115120
2070421792
21153451488
22332314512
23715843200
241534016392
253270661294
266941489040
2714667591672
2830859685088
2964670865304
30135011595856
31280813639680

[1,2,8,24,66,184,488,1248,3136,7776,18780,44880,
 105896,246124,567008,1293840,2920626,6545352,
 14555388,32115120,70421792,153451488,332314512,
 715843200,1534016392,3270661294,6941489040,
 14667591672,30859685088,64670865304,135011595856,
 280813639680]