A228405 - cp's OEIS frontend

A228405 Pellian Array, A(n, k) with numbers m such that 2*m^2 +- 2^k is a square, and their corresponding square roots, read downward by diagonals.

n	a(n)
0	0
1	1
2	1
3	0
4	1
5	2
6	2
7	2
8	3
9	5
10	0
11	2
12	4
13	7
14	12
15	4
16	4
17	6
18	10
19	17
20	29
21	0
22	4
23	8
24	14
25	24
26	41
27	70
28	8
29	8
30	12
31	20
32	34
33	58
34	99
35	169
36	0
37	8
38	16
39	28
40	48
41	82
42	140
43	239
44	408
45	16
46	16
47	24
48	40
49	68
50	116
51	198
52	338
53	577
54	985
55	0
56	16
57	32
58	56
59	96
60	164
61	280
62	478
63	816
64	1393
65	2378

[0, 1, 1, 0, 1, 2, 2, 2, 3, 5, 0, 2, 4, 7, 12, 4, 4, 6, 10, 17, 29, 0, 4, 8, 14, 24, 41, 70, 8, 8, 12, 20, 34, 58, 99, 169, 0, 8, 16, 28, 48, 82, 140, 239, 408, 16, 16, 24, 40, 68, 116, 198, 338, 577, 985, 0, 16, 32, 56, 96, 164, 280, 478, 816, 1393, 2378]

cp's OEIS Frontend

A228405 Pellian Array, A(n, k) with numbers m such that 2*m^2 +- 2^k is a square, and their corresponding square roots, read downward by diagonals.

Table of values

List of values