A047838 - cp's OEIS frontend

A047838 a(n) = floor(n^2/2) - 1.

n	a(n)
2	1
3	3
4	7
5	11
6	17
7	23
8	31
9	39
10	49
11	59
12	71
13	83
14	97
15	111
16	127
17	143
18	161
19	179
20	199
21	219
22	241
23	263
24	287
25	311
26	337
27	363
28	391
29	419
30	449
31	479
32	511
33	543
34	577
35	611
36	647
37	683
38	721
39	759
40	799
41	839
42	881
43	923
44	967
45	1011
46	1057
47	1103
48	1151
49	1199
50	1249
51	1299
52	1351
53	1403

[1, 3, 7, 11, 17, 23, 31, 39, 49, 59, 71, 83, 97, 111, 127, 143, 161, 179, 199, 219, 241, 263, 287, 311, 337, 363, 391, 419, 449, 479, 511, 543, 577, 611, 647, 683, 721, 759, 799, 839, 881, 923, 967, 1011, 1057, 1103, 1151, 1199, 1249, 1299, 1351, 1403]

cp's OEIS Frontend

A047838 a(n) = floor(n^2/2) - 1.

Table of values

List of values