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A250847 as a simple table

n a(n)
1 400
2 2457
3 13097
4 63631
5 291165
6 1280447
7 5480917
8 23024631
9 95448605
10 391939087
11 1598379237
12 6485763431
13 26220548845
14 105716192127
15 425369781557
16 1709000211031
17 6858576189885
18 27502054979567
19 110211518943877

[400,2457,13097,63631,291165,1280447,5480917,
 23024631,95448605,391939087,1598379237,6485763431,
 26220548845,105716192127,425369781557,
 1709000211031,6858576189885,27502054979567,
 110211518943877]

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Last modified October 26 21:33 EDT 2021. Contains 348269 sequences. (Running on oeis4.)