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A187998 as a simple table

na(n)
11
26
39
446
5117
6636
72596
813343
966452
10354806
111898800
1210452050
1358080269
14327389928
151863061322
1610707246833
1762028855007
18362078074528
192127680924575
2012580327500008
2174800656700824
22447053889525102
232684568476124840
2416191874238303244

[1,6,9,46,117,636,2596,13343,66452,354806,1898800,
 10452050,58080269,327389928,1863061322,
 10707246833,62028855007,362078074528,
 2127680924575,12580327500008,74800656700824,
 447053889525102,2684568476124840,
 16191874238303244]