A121174 - cp's OEIS frontend

A121174 Sequence S with property (making all terms distinct) that (i) a(1)=3, (ii) for n is S, a(n)=a(1)+a(2)+...+a(n-1), (iii) for n not in S, a(n)=the smallest number different from a(1), ..., a(n-1) not breaking condition (ii).

n	a(n)
1	3
2	4
3	7
4	14
5	6
6	34
7	68
8	9
9	145
10	11
11	301
12	13
13	615
14	1230
15	16
16	2476
17	18
18	4970
19	20
20	9960
21	22
22	19942
23	24
24	39908
25	26
26	79842
27	28
28	159712
29	30
30	319454
31	32
32	638940
33	35
34	1277915
35	2555830
36	37
37	5111697
38	39
39	10223433
40	41
41	20446907
42	43
43	40893857
44	45

[3, 4, 7, 14, 6, 34, 68, 9, 145, 11, 301, 13, 615, 1230, 16, 2476, 18, 4970, 20, 9960, 22, 19942, 24, 39908, 26, 79842, 28, 159712, 30, 319454, 32, 638940, 35, 1277915, 2555830, 37, 5111697, 39, 10223433, 41, 20446907, 43, 40893857, 45]

cp's OEIS Frontend

A121174 Sequence S with property (making all terms distinct) that (i) a(1)=3, (ii) for n is S, a(n)=a(1)+a(2)+...+a(n-1), (iii) for n not in S, a(n)=the smallest number different from a(1), ..., a(n-1) not breaking condition (ii).

Table of values

List of values