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A124026 as a simple table

na(n)
10
22
31
414
526
6132
7364
81416
94488
1016016
1153296
12184736
13625184
142145600
157303360
1624979584
1785196928
18291057920
19993379072
203392317952
2111580678656
2239541748736
23134998297600
24460924372992
251573671536640
265372896120832

[0,2,1,14,26,132,364,1416,4488,16016,53296,184736,
 625184,2145600,7303360,24979584,85196928,
 291057920,993379072,3392317952,11580678656,
 39541748736,134998297600,460924372992,
 1573671536640,5372896120832]