A061777 - cp's OEIS frontend

A061777 Start with a single triangle; at n-th generation add a triangle at each vertex, allowing triangles to overlap; sequence gives total population of triangles at n-th generation.

n	a(n)
0	1
1	4
2	10
3	22
4	40
5	70
6	112
7	178
8	268
9	406
10	592
11	874
12	1252
13	1822
14	2584
15	3730
16	5260
17	7558
18	10624
19	15226
20	21364
21	30574
22	42856
23	61282
24	85852
25	122710
26	171856
27	245578
28	343876
29	491326
30	687928
31	982834
32	1376044
33	1965862
34	2752288
35	3931930
36	5504788

[1, 4, 10, 22, 40, 70, 112, 178, 268, 406, 592, 874, 1252, 1822, 2584, 3730, 5260, 7558, 10624, 15226, 21364, 30574, 42856, 61282, 85852, 122710, 171856, 245578, 343876, 491326, 687928, 982834, 1376044, 1965862, 2752288, 3931930, 5504788]

cp's OEIS Frontend

A061777 Start with a single triangle; at n-th generation add a triangle at each vertex, allowing triangles to overlap; sequence gives total population of triangles at n-th generation.

Table of values

List of values