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A136506 as a simple table

n a(n)
0 1
1 4
2 15
3 120
4 3060
5 278256
6 90858768
7 105637584000
8 436355999662176
9 6431591598617108352
10 340881559632021623909760
11 65533747894341651530074060800
12 46081376018330435634530315478453248 

[1,4,15,120,3060,278256,90858768,105637584000,
 436355999662176,6431591598617108352,
 340881559632021623909760,
 65533747894341651530074060800,
 46081376018330435634530315478453248]

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Last modified August 19 22:28 EDT 2024. Contains 375310 sequences. (Running on oeis4.)