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A027914 as a simple table

na(n)
01
12
26
317
450
5147
6435
71290
83834
911411
1034001
11101400
12302615
13903632
142699598
158068257
1624121674
1772137547
18215786649
19645629160
201932081885
215782851966
2217311097568
2351828203475
24155188936431
25464732722872

[1,2,6,17,50,147,435,1290,3834,11411,34001,101400,
 302615,903632,2699598,8068257,24121674,72137547,
 215786649,645629160,1932081885,5782851966,
 17311097568,51828203475,155188936431,464732722872]