A255840 - cp's OEIS frontend

A255840 a(n) = (4n^2 - 4n + 1 - (-1)^n)/2.

n	a(n)
0	0
1	1
2	4
3	13
4	24
5	41
6	60
7	85
8	112
9	145
10	180
11	221
12	264
13	313
14	364
15	421
16	480
17	545
18	612
19	685
20	760
21	841
22	924
23	1013
24	1104
25	1201
26	1300
27	1405
28	1512
29	1625
30	1740
31	1861
32	1984
33	2113
34	2244
35	2381
36	2520
37	2665
38	2812
39	2965
40	3120
41	3281
42	3444
43	3613
44	3784
45	3961
46	4140
47	4325
48	4512

[0, 1, 4, 13, 24, 41, 60, 85, 112, 145, 180, 221, 264, 313, 364, 421, 480, 545, 612, 685, 760, 841, 924, 1013, 1104, 1201, 1300, 1405, 1512, 1625, 1740, 1861, 1984, 2113, 2244, 2381, 2520, 2665, 2812, 2965, 3120, 3281, 3444, 3613, 3784, 3961, 4140, 4325, 4512]

cp's OEIS Frontend

A255840 a(n) = (4n^2 - 4n + 1 - (-1)^n)/2.

Table of values

List of values

cp's OEIS Frontend

A255840 a(n) = (4*n^2 - 4*n + 1 - (-1)^n)/2.

Table of values

List of values

A255840 a(n) = (4n^2 - 4n + 1 - (-1)^n)/2.