A324643 - cp's OEIS frontend

A324643 Numbers k such that bitand(2k,sigma(k))/2 = k = bitand(k,sigma(k)-k), where bitand is bitwise-AND, A004198.

n	a(n)
1	6
2	20
3	28
4	36
5	88
6	100
7	104
8	264
9	272
10	304
11	368
12	392
13	464
14	496
15	550
16	784
17	1032
18	1040
19	1044
20	1056
21	1068
22	1104
23	1120
24	1184
25	1232
26	1312
27	1376
28	1504
29	1696
30	1888
31	1952
32	2140
33	3222
34	4100
35	4128
36	4160
37	4288
38	4512
39	4544
40	4624
41	4640
42	4672
43	5056
44	5312
45	5696
46	6208
47	6328
48	6464
49	6592
50	6808
51	6848
52	6976
53	7232
54	7304
55	8128
56	8288
57	8968
58	9256
59	10184

[6, 20, 28, 36, 88, 100, 104, 264, 272, 304, 368, 392, 464, 496, 550, 784, 1032, 1040, 1044, 1056, 1068, 1104, 1120, 1184, 1232, 1312, 1376, 1504, 1696, 1888, 1952, 2140, 3222, 4100, 4128, 4160, 4288, 4512, 4544, 4624, 4640, 4672, 5056, 5312, 5696, 6208, 6328, 6464, 6592, 6808, 6848, 6976, 7232, 7304, 8128, 8288, 8968, 9256, 10184]

cp's OEIS Frontend

A324643 Numbers k such that bitand(2k,sigma(k))/2 = k = bitand(k,sigma(k)-k), where bitand is bitwise-AND, A004198.

Table of values

List of values