A306684 - cp's OEIS frontend

A306684 Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of 2/(1 - x + sqrt(1 - 2x + (1-4k)*x^2)).

n	a(n)
0	1
1	1
2	1
3	1
4	1
5	1
6	1
7	1
8	2
9	1
10	1
11	1
12	3
13	4
14	1
15	1
16	1
17	4
18	7
19	9
20	1
21	1
22	1
23	5
24	10
25	21
26	21
27	1
28	1
29	1
30	6
31	13
32	37
33	61
34	51
35	1
36	1
37	1
38	7
39	16
40	57
41	121
42	191
43	127
44	1
45	1
46	1
47	8
48	19
49	81
50	201
51	451
52	603
53	323
54	1
55	1
56	1
57	9
58	22
59	109
60	301
61	861
62	1639
63	1961
64	835
65	1

[1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 1, 1, 3, 4, 1, 1, 1, 4, 7, 9, 1, 1, 1, 5, 10, 21, 21, 1, 1, 1, 6, 13, 37, 61, 51, 1, 1, 1, 7, 16, 57, 121, 191, 127, 1, 1, 1, 8, 19, 81, 201, 451, 603, 323, 1, 1, 1, 9, 22, 109, 301, 861, 1639, 1961, 835, 1]

cp's OEIS Frontend

A306684 Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of 2/(1 - x + sqrt(1 - 2x + (1-4k)*x^2)).

Table of values

List of values

cp's OEIS Frontend

A306684 Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of 2/(1 - x + sqrt(1 - 2*x + (1-4*k)*x^2)).

Table of values

List of values

A306684 Square array A(n,k), n >= 0, k >= 0, read by antidiagonals, where column k is the expansion of 2/(1 - x + sqrt(1 - 2x + (1-4k)*x^2)).