A131723 - cp's OEIS frontend

A131723 a(2n) = 1-n^2, a(2n+1) = n*(n+1).

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]

cp's OEIS Frontend

A131723 a(2n) = 1-n^2, a(2n+1) = n*(n+1).

Table of values

List of values

cp's OEIS Frontend

A131723 a(2*n) = 1-n^2, a(2*n+1) = n*(n+1).

Table of values

List of values

A131723 a(2n) = 1-n^2, a(2n+1) = n*(n+1).