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A227960 as a simple table

na(n)
01
13
26
315
424
560
6105
7255
8384
9960
101632
111680
124080
1315555
1427030
1565535
1698304
17245760
18417792
19430080
201044480
211582080
223947520
233982080
246908160
256919680
2616776960
27106991625
28267448335
291019462460
301771476585
314294967295

[1,3,6,15,24,60,105,255,384,960,1632,1680,4080,
 15555,27030,65535,98304,245760,417792,430080,
 1044480,1582080,3947520,3982080,6908160,6919680,
 16776960,106991625,267448335,1019462460,
 1771476585,4294967295]