A258875 - cp's OEIS frontend

A258875 a(1) = a(2) = a(3) = 1; for n > 3, a(n) = ceiling((a(n-1) + a(n-2) + a(n-3))/2).

n	a(n)
1	1
2	1
3	1
4	2
5	2
6	3
7	4
8	5
9	6
10	8
11	10
12	12
13	15
14	19
15	23
16	29
17	36
18	44
19	55
20	68
21	84
22	104
23	128
24	158
25	195
26	241
27	297
28	367
29	453
30	559
31	690
32	851
33	1050
34	1296
35	1599
36	1973
37	2434
38	3003
39	3705
40	4571
41	5640
42	6958
43	8585
44	10592
45	13068
46	16123
47	19892
48	24542
49	30279

[1, 1, 1, 2, 2, 3, 4, 5, 6, 8, 10, 12, 15, 19, 23, 29, 36, 44, 55, 68, 84, 104, 128, 158, 195, 241, 297, 367, 453, 559, 690, 851, 1050, 1296, 1599, 1973, 2434, 3003, 3705, 4571, 5640, 6958, 8585, 10592, 13068, 16123, 19892, 24542, 30279]

cp's OEIS Frontend

A258875 a(1) = a(2) = a(3) = 1; for n > 3, a(n) = ceiling((a(n-1) + a(n-2) + a(n-3))/2).

Table of values

List of values