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A027939 as a simple table

na(n)
31
429
5247
61300
75270
818228
956967
10166681
11467301
121274856
133419252
149076280
1523945893
1662955061
17165188091
18432974764
191134224458
202970340412
217777628427
2220363608737
2353314542953
24139581703056
25365432651464
26956718812272
272504726904937
286557465674125

[1,29,247,1300,5270,18228,56967,166681,467301,
 1274856,3419252,9076280,23945893,62955061,
 165188091,432974764,1134224458,2970340412,
 7777628427,20363608737,53314542953,139581703056,
 365432651464,956718812272,2504726904937,
 6557465674125]