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A012995 as a simple table

n a(n)
0 1
1 4
2 72
3 3510
4 315000
5 45898650
6 9783981900
7 2881566037350
8 1118460016674000
9 553787154746075250
10 340453667922140272500
11 254502044013845436558750
12 227301229608843762807435000 

[1,4,72,3510,315000,45898650,9783981900,
 2881566037350,1118460016674000,553787154746075250,
 340453667922140272500,254502044013845436558750,
 227301229608843762807435000]

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Last modified April 25 16:23 EDT 2024. Contains 371989 sequences. (Running on oeis4.)