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A066524 as a simple table

na(n)
00
11
26
321
460
5155
6378
7889
82040
94599
1010230
1122517
1249140
13106483
14229362
15491505
161048560
172228207
184718574
199961453
2020971500
2144040171
2292274666
23192937961
24402653160
25838860775
261744830438
273623878629
287516192740
2915569256419
3032212254690

[0,1,6,21,60,155,378,889,2040,4599,10230,22517,
 49140,106483,229362,491505,1048560,2228207,
 4718574,9961453,20971500,44040171,92274666,
 192937961,402653160,838860775,1744830438,
 3623878629,7516192740,15569256419,32212254690]