A215938 - cp's OEIS frontend

A215938 Numbers n such that the Fibonacci number F(n) can be written in the form a^2 + 5*b^2.

n	a(n)
1	1
2	2
3	5
4	8
5	11
6	12
7	25
8	29
9	32
10	41
11	48
12	55
13	89
14	121
15	125
16	128
17	131
18	145
19	179
20	192
21	205
22	275
23	331
24	359
25	401
26	421
27	431
28	445
29	449
30	509
31	512
32	569
33	571
34	601
35	605
36	625
37	631
38	655
39	659
40	691
41	725
42	768
43	895
44	911
45	1025
46	1375

[1, 2, 5, 8, 11, 12, 25, 29, 32, 41, 48, 55, 89, 121, 125, 128, 131, 145, 179, 192, 205, 275, 331, 359, 401, 421, 431, 445, 449, 509, 512, 569, 571, 601, 605, 625, 631, 655, 659, 691, 725, 768, 895, 911, 1025, 1375]

cp's OEIS Frontend

A215938 Numbers n such that the Fibonacci number F(n) can be written in the form a^2 + 5*b^2.

Table of values

List of values