A074148 - cp's OEIS frontend

A074148 a(n) = n + floor(n^2/2).

n	a(n)
1	1
2	4
3	7
4	12
5	17
6	24
7	31
8	40
9	49
10	60
11	71
12	84
13	97
14	112
15	127
16	144
17	161
18	180
19	199
20	220
21	241
22	264
23	287
24	312
25	337
26	364
27	391
28	420
29	449
30	480
31	511
32	544
33	577
34	612
35	647
36	684
37	721
38	760
39	799
40	840
41	881
42	924
43	967
44	1012
45	1057
46	1104
47	1151
48	1200
49	1249
50	1300
51	1351
52	1404
53	1457

[1, 4, 7, 12, 17, 24, 31, 40, 49, 60, 71, 84, 97, 112, 127, 144, 161, 180, 199, 220, 241, 264, 287, 312, 337, 364, 391, 420, 449, 480, 511, 544, 577, 612, 647, 684, 721, 760, 799, 840, 881, 924, 967, 1012, 1057, 1104, 1151, 1200, 1249, 1300, 1351, 1404, 1457]

cp's OEIS Frontend

A074148 a(n) = n + floor(n^2/2).

Table of values

List of values