A123937 - cp's OEIS frontend

A123937 Triangle read by rows: T(x, y) = 0 if y > x, = 1 if y = 0, or = 2*Sum_{k >= 1, x-k^2 >= y} T(x-k^2, y-1) otherwise. The zeros are omitted from the sequence.

n	a(n)
0	1
1	1
2	2
3	1
4	2
5	4
6	1
7	2
8	4
9	8
10	1
11	4
12	4
13	8
14	16
15	1
16	4
17	12
18	8
19	16
20	32
21	1
22	4
23	12
24	32
25	16
26	32
27	64
28	1
29	4
30	12
31	32
32	80
33	32
34	64
35	128
36	1
37	4
38	16
39	32
40	80
41	192
42	64
43	128
44	256
45	1
46	6
47	16
48	56
49	80
50	192
51	448
52	128
53	256
54	512
55	1
56	6
57	24
58	56
59	176
60	192
61	448
62	1024
63	256
64	512
65	1024

[1, 1, 2, 1, 2, 4, 1, 2, 4, 8, 1, 4, 4, 8, 16, 1, 4, 12, 8, 16, 32, 1, 4, 12, 32, 16, 32, 64, 1, 4, 12, 32, 80, 32, 64, 128, 1, 4, 16, 32, 80, 192, 64, 128, 256, 1, 6, 16, 56, 80, 192, 448, 128, 256, 512, 1, 6, 24, 56, 176, 192, 448, 1024, 256, 512, 1024]

cp's OEIS Frontend

A123937 Triangle read by rows: T(x, y) = 0 if y > x, = 1 if y = 0, or = 2*Sum_{k >= 1, x-k^2 >= y} T(x-k^2, y-1) otherwise. The zeros are omitted from the sequence.

Table of values

List of values