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A284994 as a simple table

n a(n)
1 1
2 1
3 0
4 1
5 1
6 2
7 3
8 6
9 11
10 24
11 52
12 120
13 287
14 720
15 1871
16 5040
17 14034
18 40320
19 119292
20 362880
21 1133278
22 3628800
23 11899423
24 39916800
25 136843365
26 479001600
27 1710542068
28 6227020800
29 23092317922
30 87178291200
31 334838609873
32 1307674368000
33 5189998453040

[1,1,0,1,1,2,3,6,11,24,52,120,287,720,1871,5040,
 14034,40320,119292,362880,1133278,3628800,
 11899423,39916800,136843365,479001600,1710542068,
 6227020800,23092317922,87178291200,334838609873,
 1307674368000,5189998453040]

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Last modified July 28 09:21 EDT 2024. Contains 374676 sequences. (Running on oeis4.)