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A084708 as a simple table

na(n)
11
22
33
47
512
637
793
8354
91350
106351
1131950
12179307
131071265
146845581
1546162583
16327731950
172437753740
1818948599220
19153498350745
201293123243928
2111306475314467
22102425554299516
23959826755336242
249290811905391501

[1,2,3,7,12,37,93,354,1350,6351,31950,179307,
 1071265,6845581,46162583,327731950,2437753740,
 18948599220,153498350745,1293123243928,
 11306475314467,102425554299516,959826755336242,
 9290811905391501]