A245581 - cp's OEIS frontend

A245581 a(n) = (5 * (1 + (-1)^(1 + n)) + 2 * n^2) / 4.

n	a(n)
0	0
1	3
2	2
3	7
4	8
5	15
6	18
7	27
8	32
9	43
10	50
11	63
12	72
13	87
14	98
15	115
16	128
17	147
18	162
19	183
20	200
21	223
22	242
23	267
24	288
25	315
26	338
27	367
28	392
29	423
30	450
31	483
32	512
33	547
34	578
35	615
36	648
37	687
38	722
39	763
40	800
41	843
42	882
43	927
44	968
45	1015
46	1058
47	1107
48	1152
49	1203
50	1250
51	1303
52	1352
53	1407

[0, 3, 2, 7, 8, 15, 18, 27, 32, 43, 50, 63, 72, 87, 98, 115, 128, 147, 162, 183, 200, 223, 242, 267, 288, 315, 338, 367, 392, 423, 450, 483, 512, 547, 578, 615, 648, 687, 722, 763, 800, 843, 882, 927, 968, 1015, 1058, 1107, 1152, 1203, 1250, 1303, 1352, 1407]

cp's OEIS Frontend

A245581 a(n) = (5 * (1 + (-1)^(1 + n)) + 2 * n^2) / 4.

Table of values

List of values