A225144 - cp's OEIS frontend

A225144 a(n) = Sum_{i=n..2n} i^2(-1)^i.

n	a(n)
0	0
1	3
2	11
3	18
4	42
5	45
6	93
7	84
8	164
9	135
10	255
11	198
12	366
13	273
14	497
15	360
16	648
17	459
18	819
19	570
20	1010
21	693
22	1221
23	828
24	1452
25	975
26	1703
27	1134
28	1974
29	1305
30	2265
31	1488
32	2576
33	1683
34	2907
35	1890
36	3258
37	2109
38	3629
39	2340
40	4020
41	2583
42	4431
43	2838
44	4862
45	3105
46	5313
47	3384

[0, 3, 11, 18, 42, 45, 93, 84, 164, 135, 255, 198, 366, 273, 497, 360, 648, 459, 819, 570, 1010, 693, 1221, 828, 1452, 975, 1703, 1134, 1974, 1305, 2265, 1488, 2576, 1683, 2907, 1890, 3258, 2109, 3629, 2340, 4020, 2583, 4431, 2838, 4862, 3105, 5313, 3384]

cp's OEIS Frontend

A225144 a(n) = Sum_{i=n..2n} i^2(-1)^i.

Table of values

List of values

cp's OEIS Frontend

A225144 a(n) = Sum_{i=n..2*n} i^2*(-1)^i.

Table of values

List of values

A225144 a(n) = Sum_{i=n..2n} i^2(-1)^i.