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A003685 as a simple table

na(n)
11
28
320
462
5132
6336
7688
81578
93190
106902
1113878
1229038
1358238
14119518
15239390
16485822
17972414
181960830
193923326
207882494
2115768574
2231616510
2363240702
24126655486
25253327358
26507033598
271014102014
282029023230
294058120190
308118001662
3116236158974
3232476086270

[1,8,20,62,132,336,688,1578,3190,6902,13878,29038,
 58238,119518,239390,485822,972414,1960830,3923326,
 7882494,15768574,31616510,63240702,126655486,
 253327358,507033598,1014102014,2029023230,
 4058120190,8118001662,16236158974,32476086270]