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A052993 as a simple table

na(n)
01
11
24
34
413
513
640
740
8121
9121
10364
11364
121093
131093
143280
153280
169841
179841
1829524
1929524
2088573
2188573
22265720
23265720
24797161
25797161
262391484
272391484
287174453
297174453
3021523360
3121523360
3264570081
3364570081
34193710244

[1,1,4,4,13,13,40,40,121,121,364,364,1093,1093,
 3280,3280,9841,9841,29524,29524,88573,88573,
 265720,265720,797161,797161,2391484,2391484,
 7174453,7174453,21523360,21523360,64570081,
 64570081,193710244]