A000869 - OEIS

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A000869 as a simple table

n	a(n)
1	4
2	27
3	14056
4	104751025086
5	14737381492157353997140846
6	583807825091767184801127161305581049499763751729421166

[4,27,14056,104751025086, 14737381492157353997140846, 58380782509176718480112716130558104949976375172942\ 1166]