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A207981 as a simple table

na(n)
11
22
32
45
57
65
715
867
967
1015
1152
121080
134192
141080
1552
16203
1725287
18587208
19587208
2025287
21203
22877
23794545
24147512732
25953124784
26147512732
27794545
28877
294140
3031858034
3158668937932
323410310590912
333410310590912
3458668937932
3531858034

[1,2,2,5,7,5,15,67,67,15,52,1080,4192,1080,52,203,
 25287,587208,587208,25287,203,877,794545,
 147512732,953124784,147512732,794545,877,4140,
 31858034,58668937932,3410310590912,3410310590912,
 58668937932,31858034]