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A294037 as a simple table

n a(n)
0 1
1 4
2 16
3 64
4 232
5 544
6 -1664
7 -37376
8 -362024
9 -2743712
10 -17780864
11 -98955776
12 -442825664
13 -1129423616
14 5536033792
15 118591811584
16 1224814969816
17 9905491019104
18 68032143081856
19 398051159254528
20 1854461906222272
21 4784426026102528

[1,4,16,64,232,544,-1664,-37376,-362024,-2743712,
 -17780864,-98955776,-442825664,-1129423616,
 5536033792,118591811584,1224814969816,
 9905491019104,68032143081856,398051159254528,
 1854461906222272,4784426026102528]

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Last modified July 16 12:46 EDT 2024. Contains 374348 sequences. (Running on oeis4.)