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A038360 as a simple table

na(n)
31
43
56
614
729
860
9123
10249
11503
121012
132032
144075
158164
1616347
1732719
1865471
19130986
20262030
21524137
221048376
232096887
244193953
258388143
2616776600
2733553616
2867107783
29134216296
30268433559
31536868399
321073738495
332147479238
344294961454
358589926853
3617179858932
3734359724787
3868719458745
39137438929639
40274877875372

[1,3,6,14,29,60,123,249,503,1012,2032,4075,8164,
 16347,32719,65471,130986,262030,524137,1048376,
 2096887,4193953,8388143,16776600,33553616,
 67107783,134216296,268433559,536868399,1073738495,
 2147479238,4294961454,8589926853,17179858932,
 34359724787,68719458745,137438929639,274877875372]