A120160 - cp's OEIS frontend

A120160 a(n) = ceiling(Sum_{i=1..n-1} a(i)/4) for n >= 2 starting with a(1) = 1.

n	a(n)
1	1
2	1
3	1
4	1
5	1
6	2
7	2
8	3
9	3
10	4
11	5
12	6
13	8
14	10
15	12
16	15
17	19
18	24
19	30
20	37
21	47
22	58
23	73
24	91
25	114
26	142
27	178
28	222
29	278
30	347
31	434
32	543
33	678
34	848
35	1060
36	1325
37	1656
38	2070
39	2588
40	3235
41	4043
42	5054
43	6318
44	7897
45	9871
46	12339
47	15424
48	19280
49	24100
50	30125
51	37656
52	47070
53	58838
54	73547

[1, 1, 1, 1, 1, 2, 2, 3, 3, 4, 5, 6, 8, 10, 12, 15, 19, 24, 30, 37, 47, 58, 73, 91, 114, 142, 178, 222, 278, 347, 434, 543, 678, 848, 1060, 1325, 1656, 2070, 2588, 3235, 4043, 5054, 6318, 7897, 9871, 12339, 15424, 19280, 24100, 30125, 37656, 47070, 58838, 73547]

cp's OEIS Frontend

A120160 a(n) = ceiling(Sum_{i=1..n-1} a(i)/4) for n >= 2 starting with a(1) = 1.

Table of values

List of values