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A209108 as a simple table

na(n)
11
22
31
45
55
615
725
868
9139
10354
11813
122047
134935
1412421
1530833
1678102
17197139
18503132
191284711
203302155
218503965
2221996761
2357026957
24148322398
25386626825
261010375144
272645762431
286942725217
2918251279163
3048065184969
31126783827201

[1,2,1,5,5,15,25,68,139,354,813,2047,4935,12421,
 30833,78102,197139,503132,1284711,3302155,8503965,
 21996761,57026957,148322398,386626825,1010375144,
 2645762431,6942725217,18251279163,48065184969,
 126783827201]