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A001137 as a simple table

na(n)
11
22
32
44
58
616
733
856
990
10164
11330
12688
131440
143008
156291
1613168
1727604
1857896
19120730
20248312
21501464
22995664
231954582
243821328
257495996
2614848472
2729815976
2860741680
29125363472
30261452256
31549461078
321160693056
332459679936
345221717888

[1,2,2,4,8,16,33,56,90,164,330,688,1440,3008,6291,
 13168,27604,57896,120730,248312,501464,995664,
 1954582,3821328,7495996,14848472,29815976,
 60741680,125363472,261452256,549461078,1160693056,
 2459679936,5221717888]