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A131723 as a simple table

n a(n)
0 0
1 2
2 -3
3 6
4 -8
5 12
6 -15
7 20
8 -24
9 30
10 -35
11 42
12 -48
13 56
14 -63
15 72
16 -80
17 90
18 -99
19 110
20 -120
21 132
22 -143
23 156
24 -168
25 182
26 -195
27 210
28 -224
29 240
30 -255
31 272
32 -288
33 306
34 -323
35 342
36 -360
37 380
38 -399
39 420
40 -440
41 462
42 -483
43 506
44 -528
45 552
46 -575
47 600
48 -624
49 650
50 -675

[0,2,-3,6,-8,12,-15,20,-24,30,-35,42,-48,56,-63,
 72,-80,90,-99,110,-120,132,-143,156,-168,182,-195,
 210,-224,240,-255,272,-288,306,-323,342,-360,380,
 -399,420,-440,462,-483,506,-528,552,-575,600,-624,
 650,-675]

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)