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A130618 as a simple table

na(n)
11
21
32
44
54
612
712
835
963
1063
11173
12368
13734
141448
152884
165607
1711340
1816947
1939627
2079301
21118928
22271750
23543500
241092066
252184858
264358317
278727848
2817455759
2934911652
3061095259
31130918366
32244381036
33506138640
341012353685
352024551664

[1,1,2,4,4,12,12,35,63,63,173,368,734,1448,2884,
 5607,11340,16947,39627,79301,118928,271750,543500,
 1092066,2184858,4358317,8727848,17455759,34911652,
 61095259,130918366,244381036,506138640,1012353685,
 2024551664]