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A007236 as a simple table

n a(n)
0 1
1 -7
2 18
3 -24
4 24
5 6
6 66
7 258
8 1014
9 3906
10 14760
11 54696
12 198510
13 704010
14 2431110
15 8130096
16 26103624
17 79292226
18 221534442
19 532863372
20 870102906
21 -842584128
22 -17420140980
23 -111985825752
24 -559952980782
25 -2460921694668
26 -9861404819574
27 -36339628229910

[1,-7,18,-24,24,6,66,258,1014,3906,14760,54696,
 198510,704010,2431110,8130096,26103624,79292226,
 221534442,532863372,870102906,-842584128,
 -17420140980,-111985825752,-559952980782,
 -2460921694668,-9861404819574,-36339628229910]

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)