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A369027 a(n) = floor(n^2 * (n - 1)^(n - 1) / 2). 4
0, 0, 2, 18, 216, 3200, 56250, 1143072, 26353376, 679477248, 19371024450, 605000000000, 20542440283992, 753410487877632, 29681760446040794, 1250100767875276800, 56050417968750000000, 2665554518651030208512, 134012922425586555796674 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,3
LINKS
MATHEMATICA
A369027[n_] := If[n == 1, 0, n^2 (n-1)^(n-1) / 2];
Array[A369027, 30, 0] (* Paolo Xausa, Jan 12 2024 *)
PROG
(SageMath)
def A369027(n): return ((n - 1)^(n - 1)*n^2)//2
print([A369027(n) for n in range(22)])
CROSSREFS
Sequence in context: A092882 A123855 A121407 * A153647 A052726 A217239
KEYWORD
nonn
AUTHOR
Peter Luschny, Jan 12 2024
STATUS
approved

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Last modified July 13 01:42 EDT 2024. Contains 374259 sequences. (Running on oeis4.)