A072493 - cp's OEIS frontend

A072493 a(1) = 1 and a(n) = ceiling((Sum_{k=1..n-1} a(k))/3) for n >= 2.

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	2
7	3
8	4
9	5
10	7
11	9
12	12
13	16
14	22
15	29
16	39
17	52
18	69
19	92
20	123
21	164
22	218
23	291
24	388
25	517
26	690
27	920
28	1226
29	1635
30	2180
31	2907
32	3876
33	5168
34	6890
35	9187
36	12249
37	16332
38	21776
39	29035
40	38713
41	51618
42	68824
43	91765
44	122353
45	163138
46	217517
47	290023
48	386697

[1, 1, 1, 1, 2, 2, 3, 4, 5, 7, 9, 12, 16, 22, 29, 39, 52, 69, 92, 123, 164, 218, 291, 388, 517, 690, 920, 1226, 1635, 2180, 2907, 3876, 5168, 6890, 9187, 12249, 16332, 21776, 29035, 38713, 51618, 68824, 91765, 122353, 163138, 217517, 290023, 386697]

cp's OEIS Frontend

A072493 a(1) = 1 and a(n) = ceiling((Sum_{k=1..n-1} a(k))/3) for n >= 2.

Table of values

List of values