A245800 - cp's OEIS frontend

A245800 a(n) is the least number k such that Sum_{j=S(n)+1..S(n)+k} 1/j >= 1/2, where S(n) = Sum_{i=1..n-1} a(i) and S(1) = 0.

n	a(n)
1	1
2	1
3	2
4	3
5	5
6	9
7	14
8	24
9	39
10	64
11	106
12	175
13	288
14	475
15	783
16	1291
17	2129
18	3510
19	5787
20	9541
21	15730
22	25935
23	42759
24	70498
25	116232
26	191634
27	315951
28	520915
29	858844
30	1415994
31	2334579
32	3849070
33	6346044
34	10462858
35	17250336
36	28440996
37	46891275
38	77310643
39	127463701
40	210152115
41	346482262

[1, 1, 2, 3, 5, 9, 14, 24, 39, 64, 106, 175, 288, 475, 783, 1291, 2129, 3510, 5787, 9541, 15730, 25935, 42759, 70498, 116232, 191634, 315951, 520915, 858844, 1415994, 2334579, 3849070, 6346044, 10462858, 17250336, 28440996, 46891275, 77310643, 127463701, 210152115, 346482262]

cp's OEIS Frontend

A245800 a(n) is the least number k such that Sum_{j=S(n)+1..S(n)+k} 1/j >= 1/2, where S(n) = Sum_{i=1..n-1} a(i) and S(1) = 0.

Table of values

List of values