A061776 - cp's OEIS frontend

A061776 Start with a single triangle; at n-th generation add a triangle at each vertex, allowing triangles to overlap; sequence gives number of triangles in n-th generation.

n	a(n)
0	1
1	3
2	6
3	12
4	18
5	30
6	42
7	66
8	90
9	138
10	186
11	282
12	378
13	570
14	762
15	1146
16	1530
17	2298
18	3066
19	4602
20	6138
21	9210
22	12282
23	18426
24	24570
25	36858
26	49146
27	73722
28	98298
29	147450
30	196602
31	294906
32	393210
33	589818
34	786426
35	1179642
36	1572858
37	2359290
38	3145722
39	4718586
40	6291450

[1, 3, 6, 12, 18, 30, 42, 66, 90, 138, 186, 282, 378, 570, 762, 1146, 1530, 2298, 3066, 4602, 6138, 9210, 12282, 18426, 24570, 36858, 49146, 73722, 98298, 147450, 196602, 294906, 393210, 589818, 786426, 1179642, 1572858, 2359290, 3145722, 4718586, 6291450]

cp's OEIS Frontend

A061776 Start with a single triangle; at n-th generation add a triangle at each vertex, allowing triangles to overlap; sequence gives number of triangles in n-th generation.

Table of values

List of values