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A208499 as a simple table

na(n)
126
2676
3756
42124
54992
612654
733488
879376
9214560
10539792
111340052
123550932
138928264
1422884596
1558320710
16150426976
17386485092
18969138898
192534260860
206476490918
2116314573968
2242371558268
23108544182448
24275738199040

[26,676,756,2124,4992,12654,33488,79376,214560,
 539792,1340052,3550932,8928264,22884596,58320710,
 150426976,386485092,969138898,2534260860,
 6476490918,16314573968,42371558268,108544182448,
 275738199040]