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A326489 as a simple table

na(n)
01
11
22
34
46
512
622
744
888
9136
10252
11504
12896
131792
143392
156352
169720
1719440
1835664
1971328
20129952
21247232
22477664
23955328
241700416
252657280
265184000
2710368000
2819407360
2938814720
3068868352
31137736704
32260693504
33505830400
34999641600
351882820608
362807196672

[1,1,2,4,6,12,22,44,88,136,252,504,896,1792,3392,
 6352,9720,19440,35664,71328,129952,247232,477664,
 955328,1700416,2657280,5184000,10368000,19407360,
 38814720,68868352,137736704,260693504,505830400,
 999641600,1882820608,2807196672]