A326658 - cp's OEIS frontend

A326658 a(n) = 6*floor(n/2) + ceiling((n-1)^2/2).

n	a(n)
0	1
1	0
2	7
3	8
4	17
5	20
6	31
7	36
8	49
9	56
10	71
11	80
12	97
13	108
14	127
15	140
16	161
17	176
18	199
19	216
20	241
21	260
22	287
23	308
24	337
25	360
26	391
27	416
28	449
29	476
30	511
31	540
32	577
33	608
34	647
35	680
36	721
37	756
38	799
39	836
40	881
41	920
42	967
43	1008
44	1057
45	1100
46	1151
47	1196
48	1249
49	1296
50	1351
51	1400
52	1457
53	1508
54	1567
55	1620
56	1681

[1, 0, 7, 8, 17, 20, 31, 36, 49, 56, 71, 80, 97, 108, 127, 140, 161, 176, 199, 216, 241, 260, 287, 308, 337, 360, 391, 416, 449, 476, 511, 540, 577, 608, 647, 680, 721, 756, 799, 836, 881, 920, 967, 1008, 1057, 1100, 1151, 1196, 1249, 1296, 1351, 1400, 1457, 1508, 1567, 1620, 1681]

cp's OEIS Frontend

A326658 a(n) = 6*floor(n/2) + ceiling((n-1)^2/2).

Table of values

List of values