A228940 - cp's OEIS frontend

A228940 Nodes of tree generated as follows: (1,2) is an edge, and if (x,y) is an edge, then (y, y^2 - x^2) and (y, y^2 + x^2) are edges.

n	a(n)
1	1
2	2
3	3
4	5
5	13
6	16
7	21
8	29
9	34
10	160
11	178
12	231
13	281
14	416
15	466
16	816
17	866
18	1131
19	1181
20	25431
21	25769
22	31515
23	31853
24	53105
25	53617
26	78705
27	79217
28	172615
29	173497
30	216715
31	217597
32	665015
33	666697
34	749115
35	750797
36	1278005
37	1280317
38	1393605
39	1395917
40	646710161

[1, 2, 3, 5, 13, 16, 21, 29, 34, 160, 178, 231, 281, 416, 466, 816, 866, 1131, 1181, 25431, 25769, 31515, 31853, 53105, 53617, 78705, 79217, 172615, 173497, 216715, 217597, 665015, 666697, 749115, 750797, 1278005, 1280317, 1393605, 1395917, 646710161]

cp's OEIS Frontend

A228940 Nodes of tree generated as follows: (1,2) is an edge, and if (x,y) is an edge, then (y, y^2 - x^2) and (y, y^2 + x^2) are edges.

Table of values

List of values