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A172749 as a simple table

n a(n)
1 0
2 0
3 1
4 122975608
5 552523141020099900
6 28004870901329112246159413600
7 13286253592938310343269948335403784033355
8 48077185419930811359972085602422918530347454406137600 

[0,0,1,122975608,552523141020099900,
 28004870901329112246159413600,
 13286253592938310343269948335403784033355,
 48077185419930811359972085602422918530347454406137\
 600]

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Last modified April 24 19:06 EDT 2024. Contains 371962 sequences. (Running on oeis4.)