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A250738 as a simple table

na(n)
134
238
346
462
594
6158
7286
8542
91054
102078
114126
128222
1316414
1432798
1565566
16131102
17262174
18524318
191048606
202097182
214194334
228388638
2316777246
2433554462
2567108894
26134217758
27268435486
28536870942
291073741854
302147483678
314294967326

[34,38,46,62,94,158,286,542,1054,2078,4126,8222,
 16414,32798,65566,131102,262174,524318,1048606,
 2097182,4194334,8388638,16777246,33554462,
 67108894,134217758,268435486,536870942,1073741854,
 2147483678,4294967326]