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A274778 as a simple table

n a(n)
0 0
1 3
2 26
3 442
4 12899
5 582381
6 37700452
7 3315996468
8 380835212037
9 55380159334315
10 9950025870043126
11 2165134468142294430
12 561245519520167902471
13 170913803045738754172185
14 60421582956702701927410120
15 24543570079301728283314502248
16 11353373604627607560431407875081

[0,3,26,442,12899,582381,37700452,3315996468,
 380835212037,55380159334315,9950025870043126,
 2165134468142294430,561245519520167902471,
 170913803045738754172185,
 60421582956702701927410120,
 24543570079301728283314502248,
 11353373604627607560431407875081]

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Last modified July 26 22:49 EDT 2021. Contains 346300 sequences. (Running on oeis4.)