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A038149 as a simple table

na(n)
01
11
22
35
410
522
651
7111
8256
9594
101324
113130
127285
1316435
1439430
1591959
16211519
17506408
181182650
192760810
206592080
2115409740
2236369225
2386666790
24202738635
25482548825
261148125550
272687285975
286439167735
2915301850850
3035843163720

[1,1,2,5,10,22,51,111,256,594,1324,3130,7285,
 16435,39430,91959,211519,506408,1182650,2760810,
 6592080,15409740,36369225,86666790,202738635,
 482548825,1148125550,2687285975,6439167735,
 15301850850,35843163720]