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A073949 as a simple table

na(n)
10
22
36
412
530
690
7252
8702
92106
106480
1119602
1258806
13176904
14532170
151596510
164785156
1714351094
1843053282
19129146724
20387400806
211162202418
223486725352
2310460294154
2431380882462
2594143001680
26282430067922
27847290203766
282541867422652
297625599079310

[0,2,6,12,30,90,252,702,2106,6480,19602,58806,
 176904,532170,1596510,4785156,14351094,43053282,
 129146724,387400806,1162202418,3486725352,
 10460294154,31380882462,94143001680,282430067922,
 847290203766,2541867422652,7625599079310]