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A266677 as a simple table

n a(n)
0 0
1 -1
2 6
3 -16
4 34
5 -61
6 100
7 -152
8 220
9 -305
10 410
11 -536
12 686
13 -861
14 1064
15 -1296
16 1560
17 -1857
18 2190
19 -2560
20 2970
21 -3421
22 3916
23 -4456
24 5044
25 -5681
26 6370
27 -7112
28 7910
29 -8765
30 9680
31 -10656
32 11696
33 -12801
34 13974
35 -15216
36 16530
37 -17917
38 19380
39 -20920
40 22540

[0,-1,6,-16,34,-61,100,-152,220,-305,410,-536,686,
 -861,1064,-1296,1560,-1857,2190,-2560,2970,-3421,
 3916,-4456,5044,-5681,6370,-7112,7910,-8765,9680,
 -10656,11696,-12801,13974,-15216,16530,-17917,
 19380,-20920,22540]

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Last modified February 18 13:07 EST 2018. Contains 299322 sequences. (Running on oeis4.)