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A001788 as a simple table

n a(n)
0 0
1 1
2 6
3 24
4 80
5 240
6 672
7 1792
8 4608
9 11520
10 28160
11 67584
12 159744
13 372736
14 860160
15 1966080
16 4456448
17 10027008
18 22413312
19 49807360
20 110100480
21 242221056
22 530579456
23 1157627904
24 2516582400
25 5452595200
26 11777605632

[0,1,6,24,80,240,672,1792,4608,11520,28160,67584,
 159744,372736,860160,1966080,4456448,10027008,
 22413312,49807360,110100480,242221056,530579456,
 1157627904,2516582400,5452595200,11777605632]

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Last modified April 25 10:43 EDT 2024. Contains 371967 sequences. (Running on oeis4.)