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A300439 as a simple table

na(n)
11
21
32
42
55
67
718
829
975
10132
11332
12651
131580
143268
157961
1616966
1740709
1889851
19215461
20484064
211159568
222641812
236337448
2414622880
2535051341
2681609747
27196326305
28459909847
291107083238
302611592457
316299122736
3214926657167
3336069213786
3485809507332

[1,1,2,2,5,7,18,29,75,132,332,651,1580,3268,7961,
 16966,40709,89851,215461,484064,1159568,2641812,
 6337448,14622880,35051341,81609747,196326305,
 459909847,1107083238,2611592457,6299122736,
 14926657167,36069213786,85809507332]