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A264863 as a simple table

na(n)
11
22
35
412
572
6516
72727
829935
9295297
102830610
1127816612
12288374240
134410043504
1444410041788
15716533737436
1616424244452552

[1,2,5,12,72,516,2727,29935,295297,2830610,
 27816612,288374240,4410043504,44410041788,
 716533737436,16424244452552]