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A236798 as a simple table

na(n)
181
2255
3255
4825
51231
6825
72817
86217
96217
102817
119717
1234163
1347831
1434163
159717
1634317
17191657
18420133
19420133
20191657
2134317
22122305
231116735
243722333
256154349
263722333
271116735
28122305
29442285
306597729
3134857701
3289430035
3389430035

[81,255,255,825,1231,825,2817,6217,6217,2817,9717,
 34163,47831,34163,9717,34317,191657,420133,420133,
 191657,34317,122305,1116735,3722333,6154349,
 3722333,1116735,122305,442285,6597729,34857701,
 89430035,89430035]