A278619 - cp's OEIS frontend

A278619 Hexagonal spiral constructed on the nodes of the triangular net in which each new term is the sum of its two largest neighbors in the structure.

n	a(n)
0	1
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	10
10	12
11	15
12	18
13	22
14	26
15	31
16	36
17	42
18	49
19	56
20	64
21	72
22	82
23	94
24	106
25	121
26	139
27	157
28	179
29	205
30	231
31	262
32	298
33	334
34	376
35	425
36	481
37	537
38	601
39	673
40	745
41	827
42	921
43	1027
44	1133
45	1254
46	1393
47	1550
48	1707
49	1886
50	2091
51	2322
52	2553
53	2815
54	3113
55	3447
56	3781
57	4157
58	4582
59	5063
60	5600

[1, 1, 2, 3, 4, 5, 6, 7, 8, 10, 12, 15, 18, 22, 26, 31, 36, 42, 49, 56, 64, 72, 82, 94, 106, 121, 139, 157, 179, 205, 231, 262, 298, 334, 376, 425, 481, 537, 601, 673, 745, 827, 921, 1027, 1133, 1254, 1393, 1550, 1707, 1886, 2091, 2322, 2553, 2815, 3113, 3447, 3781, 4157, 4582, 5063, 5600]

cp's OEIS Frontend

A278619 Hexagonal spiral constructed on the nodes of the triangular net in which each new term is the sum of its two largest neighbors in the structure.

Table of values

List of values