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A049894 as a simple table

na(n)
11
21
33
44
58
616
732
862
9123
10249
11498
12994
131987
143970
157932
1615848
1731666
1863393
19126786
20253570
21507139
221014274
232028540
244057064
258114098
2616228135
2732456144
2864912039
29129823582
30259646171
31519290359
321038576756
332077145596

[1,1,3,4,8,16,32,62,123,249,498,994,1987,3970,
 7932,15848,31666,63393,126786,253570,507139,
 1014274,2028540,4057064,8114098,16228135,32456144,
 64912039,129823582,259646171,519290359,1038576756,
 2077145596]