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A026889 as a simple table

na(n)
21
37
437
5178
6825
73774
817250
979326
10368516
111733597
128268603
1340003178
14196273837
15976066486
164915503146
1725042730042
18128927697340
19670023585820
203511276691660
2118537816521102
2298514404946264
23526575421631986

[1,7,37,178,825,3774,17250,79326,368516,1733597,
 8268603,40003178,196273837,976066486,4915503146,
 25042730042,128927697340,670023585820,
 3511276691660,18537816521102,98514404946264,
 526575421631986]