A309853 - cp's OEIS frontend

A309853 Array read by antidiagonals: ((z+sqrt(x))/2)^k + ((z-sqrt(x))/2)^k for columns k >= 0 and rows n >= 0, where x = 4*n+1 and y = ceiling(sqrt(x)) and z = y+1-(y mod 2).

n	a(n)
0	2
1	1
2	2
3	1
4	3
5	2
6	1
7	7
8	3
9	2
10	1
11	18
12	9
13	5
14	2
15	1
16	47
17	27
18	19
19	5
20	2
21	1
22	123
23	81
24	80
25	21
26	5
27	2
28	1
29	322
30	243
31	343
32	95
33	23
34	5
35	2
36	1
37	843
38	729
39	1475
40	433
41	110
42	25
43	7
44	2
45	1
46	2207
47	2187
48	6346
49	1975
50	527
51	125
52	39
53	7
54	2
55	1
56	5778
57	6561
58	27305
59	9009
60	2525
61	625
62	238
63	41
64	7
65	2

[2, 1, 2, 1, 3, 2, 1, 7, 3, 2, 1, 18, 9, 5, 2, 1, 47, 27, 19, 5, 2, 1, 123, 81, 80, 21, 5, 2, 1, 322, 243, 343, 95, 23, 5, 2, 1, 843, 729, 1475, 433, 110, 25, 7, 2, 1, 2207, 2187, 6346, 1975, 527, 125, 39, 7, 2, 1, 5778, 6561, 27305, 9009, 2525, 625, 238, 41, 7, 2]

cp's OEIS Frontend

A309853 Array read by antidiagonals: ((z+sqrt(x))/2)^k + ((z-sqrt(x))/2)^k for columns k >= 0 and rows n >= 0, where x = 4*n+1 and y = ceiling(sqrt(x)) and z = y+1-(y mod 2).

Table of values

List of values