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A261392 as a simple table

na(n)
11
21
33
46
511
621
740
873
9144
10274
11509
12931
131771
143555
157021
1613964
1727789
1854536
19105854
20210655
21415349
22812461
231578752
243050921
255868562
2611244267
2721472441
2840887802
2977668032
30147222550
31278556477
32540784632
331116709696
342292646735
354682550808
369519363902

[1,1,3,6,11,21,40,73,144,274,509,931,1771,3555,
 7021,13964,27789,54536,105854,210655,415349,
 812461,1578752,3050921,5868562,11244267,21472441,
 40887802,77668032,147222550,278556477,540784632,
 1116709696,2292646735,4682550808,9519363902]