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A170910 as a simple table

na(n)
1-1
21
31
43
51
613
71
827
98
1091
111
121213
131
14505
151919
162955
171
1824557
191
201136313
2134943
2212277
231
2465978519
25624
2657331
2758528
28195948483
291
301052424027703
311
3277010795
337085759
341179631
3537497599
367047825380633
371
385242861
3989281919
40355723139681937

[-1,1,1,3,1,13,1,27,8,91,1,1213,1,505,1919,2955,1,
 24557,1,1136313,34943,12277,1,65978519,624,57331,
 58528,195948483,1,1052424027703,1,77010795,
 7085759,1179631,37497599,7047825380633,1,5242861,
 89281919,355723139681937]