A224515 - cp's OEIS frontend

A224515 a(n) = least k such that sqrt(k^2 XOR (k+1)^2) = 2*n+1, a(n) = -1 if there is no such k.

n	a(n)
0	0
1	4
2	3
3	24
4	23
5	44
6	43
7	112
8	111
9	180
10	76
11	264
12	248
13	348
14	164
15	480
16	479
17	411
18	611
19	327
20	183
21	115
22	139
23	943
24	1103
25	747
26	787
27	1111
28	1447
29	323
30	699
31	1984
32	1983
33	1851
34	2243
35	2008
36	1576
37	1388
38	1684
39	1072
40	976
41	1268
42	499
43	3383
44	3271
45	4124
46	4068
47	3679
48	4511
49	4315
50	3804
51	4999

[0, 4, 3, 24, 23, 44, 43, 112, 111, 180, 76, 264, 248, 348, 164, 480, 479, 411, 611, 327, 183, 115, 139, 943, 1103, 747, 787, 1111, 1447, 323, 699, 1984, 1983, 1851, 2243, 2008, 1576, 1388, 1684, 1072, 976, 1268, 499, 3383, 3271, 4124, 4068, 3679, 4511, 4315, 3804, 4999]

cp's OEIS Frontend

A224515 a(n) = least k such that sqrt(k^2 XOR (k+1)^2) = 2*n+1, a(n) = -1 if there is no such k.

Table of values

List of values