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A340409 as a simple table

na(n)
01
11
23
37
418
542
6110
7250
8627
91439
103523
118063
1219374
1344274
14104816
15238976
16559171
171271295
182946901
196679741
2015363719
2134719631
2279335385
23178749829
24406164359
25912475815
262063298409
274622461673
2810407679805
2923254807241
3052160338735
31116252939071

[1,1,3,7,18,42,110,250,627,1439,3523,8063,19374,
 44274,104816,238976,559171,1271295,2946901,
 6679741,15363719,34719631,79335385,178749829,
 406164359,912475815,2063298409,4622461673,
 10407679805,23254807241,52160338735,116252939071]