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A000023 formatted as a simple table:

n a(n)
0 1
1 -1
2 2
3 -2
4 8
5 8
6 112
7 656
8 5504
9 49024
10 491264
11 5401856
12 64826368
13 842734592
14 11798300672
15 176974477312
16 2831591702528
17 48137058811904
18 866467058876416
19 16462874118127616
20 329257482363600896
21 6914407129633521664
22 152116956851941670912
23 3498690007594650042368
24 83968560182271617794048
25 2099214004556790411296768
26 54579564118476550760824832
27 1473648231198866870408052736

[1,-1,2,-2,8,8,112,656,5504,49024,491264,5401856,
 64826368,842734592,11798300672,176974477312,
 2831591702528,48137058811904,866467058876416,
 16462874118127616,329257482363600896,
 6914407129633521664,152116956851941670912,
 3498690007594650042368,83968560182271617794048,
 2099214004556790411296768,
 54579564118476550760824832,
 1473648231198866870408052736]

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.


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