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A080929 as a simple table

na(n)
01
13
212
340
4120
5336
6896
72304
85760
914080
1033792
1179872
12186368
13430080
14983040
152228224
165013504
1711206656
1824903680
1955050240
20121110528
21265289728
22578813952
231258291200
242726297600
255888802816
2612683575296
2727246198784

[1,3,12,40,120,336,896,2304,5760,14080,33792,
 79872,186368,430080,983040,2228224,5013504,
 11206656,24903680,55050240,121110528,265289728,
 578813952,1258291200,2726297600,5888802816,
 12683575296,27246198784]