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A109731 as a simple table

n a(n)
0 1
1 -4
2 -6
3 15
4 23
5 -56
6 -86
7 209
8 321
9 -780
10 -1198
11 2911
12 4471
13 -10864
14 -16686
15 40545
16 62273
17 -151316
18 -232406
19 564719
20 867351
21 -2107560
22 -3236998
23 7865521
24 12080641
25 -29354524
26 -45085566
27 109552575
28 168261623
29 -408855776

[1,-4,-6,15,23,-56,-86,209,321,-780,-1198,2911,
 4471,-10864,-16686,40545,62273,-151316,-232406,
 564719,867351,-2107560,-3236998,7865521,12080641,
 -29354524,-45085566,109552575,168261623,
 -408855776]

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Last modified May 25 02:01 EDT 2020. Contains 334581 sequences. (Running on oeis4.)