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A309946 as a simple table

na(n)
10
26
325
490
5295
6945
72995
89450
929749
1093555
11294058
12924041
132903320
149121612
1528657269
1690030844
17282842403
18888579011
192791558622
208769948429
2127551618702
2286555983552
23271923674474
24854273468992
252683779334331
268431341566236
2726487840921750
2883214006759229
29261424512797515

[0,6,25,90,295,945,2995,9450,29749,93555,294058,
 924041,2903320,9121612,28657269,90030844,
 282842403,888579011,2791558622,8769948429,
 27551618702,86555983552,271923674474,854273468992,
 2683779334331,8431341566236,26487840921750,
 83214006759229,261424512797515]