A121509 - cp's OEIS frontend

A121509 a(n) = 5n^2/2 - 5n + 13/4 - (-1)^n/4.

n	a(n)
1	1
2	3
3	11
4	23
5	41
6	63
7	91
8	123
9	161
10	203
11	251
12	303
13	361
14	423
15	491
16	563
17	641
18	723
19	811
20	903
21	1001
22	1103
23	1211
24	1323
25	1441
26	1563
27	1691
28	1823
29	1961
30	2103
31	2251
32	2403
33	2561
34	2723
35	2891
36	3063
37	3241
38	3423
39	3611
40	3803
41	4001
42	4203
43	4411
44	4623
45	4841
46	5063
47	5291
48	5523

[1, 3, 11, 23, 41, 63, 91, 123, 161, 203, 251, 303, 361, 423, 491, 563, 641, 723, 811, 903, 1001, 1103, 1211, 1323, 1441, 1563, 1691, 1823, 1961, 2103, 2251, 2403, 2561, 2723, 2891, 3063, 3241, 3423, 3611, 3803, 4001, 4203, 4411, 4623, 4841, 5063, 5291, 5523]

cp's OEIS Frontend

A121509 a(n) = 5n^2/2 - 5n + 13/4 - (-1)^n/4.

Table of values

List of values

cp's OEIS Frontend

A121509 a(n) = 5*n^2/2 - 5*n + 13/4 - (-1)^n/4.

Table of values

List of values

A121509 a(n) = 5n^2/2 - 5n + 13/4 - (-1)^n/4.