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A278558 as a simple table

na(n)
01
131
2527
36448
463240
5526443
63852742
725380847
8153068700
9855816380
104479330091
1122117432019
12103672066076
13463698703204
141987628351600
158195086588810
1632603090921532
17125497791966435
18468512597653134
191699911932127300
206005651320362628
2120693956328627358

[1,31,527,6448,63240,526443,3852742,25380847,
 153068700,855816380,4479330091,22117432019,
 103672066076,463698703204,1987628351600,
 8195086588810,32603090921532,125497791966435,
 468512597653134,1699911932127300,6005651320362628,
 20693956328627358]