A262136 - cp's OEIS frontend

A262136 Number of distinct fractional parts of the numbers Sum_{i=j..k} (-1)^i/i with 1 <= j <= k <= n, where the fractional part of x is given by x - floor(x).

n	a(n)
1	1
2	2
3	4
4	7
5	11
6	14
7	20
8	27
9	35
10	44
11	54
12	64
13	76
14	89
15	103
16	118
17	134
18	151
19	169
20	186
21	206
22	227
23	249
24	272
25	296
26	321
27	347
28	374
29	402
30	430
31	460
32	491
33	523
34	556
35	590
36	625
37	661
38	698
39	736
40	775
41	815
42	854
43	896
44	939
45	983
46	1028
47	1074
48	1121
49	1169
50	1218
51	1268
52	1319
53	1371
54	1424
55	1478
56	1532
57	1588
58	1645
59	1703
60	1762

[1, 2, 4, 7, 11, 14, 20, 27, 35, 44, 54, 64, 76, 89, 103, 118, 134, 151, 169, 186, 206, 227, 249, 272, 296, 321, 347, 374, 402, 430, 460, 491, 523, 556, 590, 625, 661, 698, 736, 775, 815, 854, 896, 939, 983, 1028, 1074, 1121, 1169, 1218, 1268, 1319, 1371, 1424, 1478, 1532, 1588, 1645, 1703, 1762]

cp's OEIS Frontend

A262136 Number of distinct fractional parts of the numbers Sum_{i=j..k} (-1)^i/i with 1 <= j <= k <= n, where the fractional part of x is given by x - floor(x).

Table of values

List of values