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A123761 as a simple table

na(n)
01
12
23
312
415
560
660
7240
8360
91440
101800
117200
127200
1328800
1443200
15172800
16216000
17864000
18864000
193456000
205184000
2120736000
2225920000
23103680000
24103680000
25414720000
26622080000
272488320000
283110400000
2912441600000

[1,2,3,12,15,60,60,240,360,1440,1800,7200,7200,
 28800,43200,172800,216000,864000,864000,3456000,
 5184000,20736000,25920000,103680000,103680000,
 414720000,622080000,2488320000,3110400000,
 12441600000]