A005421 - cp's OEIS frontend

A005421 Number of numbers of complexity n, i.e., that can be built from n ones using + and *, and require at least that many ones.

n	a(n)
1	1
2	1
3	1
4	1
5	2
6	3
7	2
8	6
9	6
10	7
11	14
12	16
13	20
14	34
15	42
16	56
17	84
18	108
19	152
20	214
21	295
22	398
23	569
24	763
25	1094
26	1475
27	2058
28	2878
29	3929
30	5493
31	7669
32	10501
33	14707
34	20476
35	28226
36	39287
37	54817
38	75619
39	105584
40	146910
41	203294
42	283764
43	394437
44	547485
45	763821
46	1061367
47	1476067
48	2057708
49	2861449

[1, 1, 1, 1, 2, 3, 2, 6, 6, 7, 14, 16, 20, 34, 42, 56, 84, 108, 152, 214, 295, 398, 569, 763, 1094, 1475, 2058, 2878, 3929, 5493, 7669, 10501, 14707, 20476, 28226, 39287, 54817, 75619, 105584, 146910, 203294, 283764, 394437, 547485, 763821, 1061367, 1476067, 2057708, 2861449]

cp's OEIS Frontend

A005421 Number of numbers of complexity n, i.e., that can be built from n ones using + and *, and require at least that many ones.

Table of values

List of values