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A198528 as a simple table

na(n)
11
22
32
45
515
65
715
8193
9193
1015
1152
123660
1316714
143660
1552
16202
1781844
181877316
191877316
2081844
21202
22855
231948672
24222590953
251084539825
26222590953
271948672
28855
293845
3047436498
3126670041125
32634586561196
33634586561196
3426670041125

[1,2,2,5,15,5,15,193,193,15,52,3660,16714,3660,52,
 202,81844,1877316,1877316,81844,202,855,1948672,
 222590953,1084539825,222590953,1948672,855,3845,
 47436498,26670041125,634586561196,634586561196,
 26670041125]