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A001021 as a simple table

na(n)
01
112
2144
31728
420736
5248832
62985984
735831808
8429981696
95159780352
1061917364224
11743008370688
128916100448256
13106993205379072
141283918464548864
1515407021574586368
16184884258895036416
172218611106740436992

[1,12,144,1728,20736,248832,2985984,35831808,
 429981696,5159780352,61917364224,743008370688,
 8916100448256,106993205379072,1283918464548864,
 15407021574586368,184884258895036416,
 2218611106740436992]