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A231306 as a simple table

na(n)
00
11
2128
32188
416512
580313
6296448
7903856
82393600
95686825
1012393600
1125173996
1248225408
1387922513
14153638912
15258781888
16422074368
17669120561
181034294400
191562992300
202314294400
213364080841
224808652288
236768906288
249395123712
2512872421913
2617426933888

[0,1,128,2188,16512,80313,296448,903856,2393600,
 5686825,12393600,25173996,48225408,87922513,
 153638912,258781888,422074368,669120561,
 1034294400,1562992300,2314294400,3364080841,
 4808652288,6768906288,9395123712,12872421913,
 17426933888]