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A374598 as a simple table

na(n)
01
12
26
324
494
5372
61508
76192
825638
9106908
10448356
111889040
127989676
1333902504
14144259944
15615330784
162630199942
1711263613484
1848315367076
19207556060816
20892819376964
213845161246424
2216578320962104
2371548426931616
24309070048163676
251336223562436632

[1,2,6,24,94,372,1508,6192,25638,106908,448356,
 1889040,7989676,33902504,144259944,615330784,
 2630199942,11263613484,48315367076,207556060816,
 892819376964,3845161246424,16578320962104,
 71548426931616,309070048163676,1336223562436632]