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A122595 as a simple table

na(n)
11
23
38
420
550
6125
7313
8784
91964
104920
1112325
1230875
1377344
14193752
15485362
161215865
173045825
187630000
1919113672
2047881056
21119945321
22300471235
23752701000
241885567500
254723475586
2611832629493
2729641546393
2874254101600

[1,3,8,20,50,125,313,784,1964,4920,12325,30875,
 77344,193752,485362,1215865,3045825,7630000,
 19113672,47881056,119945321,300471235,752701000,
 1885567500,4723475586,11832629493,29641546393,
 74254101600]