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A027970 as a simple table

na(n)
41
54
611
729
876
9196
10487
111148
122552
135353
1410636
1520120
1636425
1763415
18106630
19173821
20275603
21426242
22644593
23955207
241389626
251987886
262800249
273889186
285331634
297221551
309672794
3112822346
3216833919
3321901961
3428256096

[1,4,11,29,76,196,487,1148,2552,5353,10636,20120,
 36425,63415,106630,173821,275603,426242,644593,
 955207,1389626,1987886,2800249,3889186,5331634,
 7221551,9672794,12822346,16833919,21901961,
 28256096]