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A160549 as a simple table

na(n)
00
11
25
320
470
5221
6646
71772
84614
911490
1027537
1163808
12143514
13314279
14671872
151405260
162881030
175799093
1811476452
1922357584
2042922558
2181284699
22151974124
23280739800
24512761178
25926568075
261657448779
272936506316
285155349836
298972488674
3015487146900

[0,1,5,20,70,221,646,1772,4614,11490,27537,63808,
 143514,314279,671872,1405260,2881030,5799093,
 11476452,22357584,42922558,81284699,151974124,
 280739800,512761178,926568075,1657448779,
 2936506316,5155349836,8972488674,15487146900]