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A111352 as a simple table

n a(n)
0 1
1 -1
2 2
3 0
4 5
5 7
6 22
7 48
8 121
9 287
10 698
11 1680
12 4061
13 9799
14 23662
15 57120
16 137905
17 332927
18 803762
19 1940448
20 4684661
21 11309767
22 27304198
23 65918160
24 159140521
25 384199199
26 927538922
27 2239277040
28 5406093005

[1,-1,2,0,5,7,22,48,121,287,698,1680,4061,9799,
 23662,57120,137905,332927,803762,1940448,4684661,
 11309767,27304198,65918160,159140521,384199199,
 927538922,2239277040,5406093005]

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Last modified April 19 16:38 EDT 2024. Contains 371794 sequences. (Running on oeis4.)