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A207278 as a simple table

na(n)
158
23364
3121014
44686270
5181121542
66979630118
7268686202446
810346388676890
9398484229526944
1015347093146481576
11591056573797250302
1222763124435331083444
13876670255366683199756
1433762986640905791961506

[58,3364,121014,4686270,181121542,6979630118,
 268686202446,10346388676890,398484229526944,
 15347093146481576,591056573797250302,
 22763124435331083444,876670255366683199756,
 33762986640905791961506]