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A033138 as a simple table

na(n)
11
22
34
49
518
636
773
8146
9292
10585
111170
122340
134681
149362
1518724
1637449
1774898
18149796
19299593
20599186
211198372
222396745
234793490
249586980
2519173961
2638347922
2776695844
28153391689
29306783378
30613566756
311227133513
322454267026

[1,2,4,9,18,36,73,146,292,585,1170,2340,4681,9362,
 18724,37449,74898,149796,299593,599186,1198372,
 2396745,4793490,9586980,19173961,38347922,
 76695844,153391689,306783378,613566756,1227133513,
 2454267026]