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A134764 as a simple table

na(n)
11
21
35
418
569
6245
7923
83412
912864
1048549
11184755
12705162
132704155
1410399675
1540116525
16155114088
17601080389
182333593104
199075135299
2035345215162
21137846527891
22538257689683
232104098963719
248233430018756
2532247603683030

[1,1,5,18,69,245,923,3412,12864,48549,184755,
 705162,2704155,10399675,40116525,155114088,
 601080389,2333593104,9075135299,35345215162,
 137846527891,538257689683,2104098963719,
 8233430018756,32247603683030]