A247904 - cp's OEIS frontend

A247904 Start with a single pentagon; at n-th generation add a pentagon at each expandable vertex (this is the "vertex to side" version); a(n) is the sum of all label values at n-th generation. (See comment for construction rules.)

n	a(n)
0	1
1	6
2	21
3	56
4	131
5	286
6	601
7	1236
8	2511
9	5066
10	10181
11	20416
12	40891
13	81846
14	163761
15	327596
16	655271
17	1310626
18	2621341
19	5242776
20	10485651
21	20971406
22	41942921
23	83885956
24	167772031
25	335544186
26	671088501
27	1342177136
28	2684354411
29	5368708966
30	10737418081

[1, 6, 21, 56, 131, 286, 601, 1236, 2511, 5066, 10181, 20416, 40891, 81846, 163761, 327596, 655271, 1310626, 2621341, 5242776, 10485651, 20971406, 41942921, 83885956, 167772031, 335544186, 671088501, 1342177136, 2684354411, 5368708966, 10737418081]

cp's OEIS Frontend

A247904 Start with a single pentagon; at n-th generation add a pentagon at each expandable vertex (this is the "vertex to side" version); a(n) is the sum of all label values at n-th generation. (See comment for construction rules.)

Table of values

List of values