A179783 - cp's OEIS frontend

A179783 a(n) = 2n(n+1)*(n+2)/3 + (-1)^n.

n	a(n)
0	1
1	3
2	17
3	39
4	81
5	139
6	225
7	335
8	481
9	659
10	881
11	1143
12	1457
13	1819
14	2241
15	2719
16	3265
17	3875
18	4561
19	5319
20	6161
21	7083
22	8097
23	9199
24	10401
25	11699
26	13105
27	14615
28	16241
29	17979
30	19841
31	21823
32	23937
33	26179
34	28561
35	31079

[1, 3, 17, 39, 81, 139, 225, 335, 481, 659, 881, 1143, 1457, 1819, 2241, 2719, 3265, 3875, 4561, 5319, 6161, 7083, 8097, 9199, 10401, 11699, 13105, 14615, 16241, 17979, 19841, 21823, 23937, 26179, 28561, 31079]

cp's OEIS Frontend

A179783 a(n) = 2n(n+1)*(n+2)/3 + (-1)^n.

Table of values

List of values

cp's OEIS Frontend

A179783 a(n) = 2*n*(n+1)*(n+2)/3 + (-1)^n.

Table of values

List of values

A179783 a(n) = 2n(n+1)*(n+2)/3 + (-1)^n.