A225920 - cp's OEIS frontend

A225920 a(n) is the least k such that f(a(n-1)+1) + ... + f(k) > f(a(n-2)+1) + ... + f(a(n-1)) for n > 1, where f(n) = 1/(n+5) and a(1) = 1.

n	a(n)
1	1
2	13
3	48
4	150
5	447
6	1312
7	3831
8	11167
9	32531
10	94748
11	275938
12	803605
13	2340292
14	6815476
15	19848236
16	57802615
17	168334451
18	490228448
19	1427657419
20	4157665074
21	12108072013
22	35261476137
23	102689486632
24	299055281267
25	870917405325
26	2536310757258
27	7386317253546
28	21510645891422

[1, 13, 48, 150, 447, 1312, 3831, 11167, 32531, 94748, 275938, 803605, 2340292, 6815476, 19848236, 57802615, 168334451, 490228448, 1427657419, 4157665074, 12108072013, 35261476137, 102689486632, 299055281267, 870917405325, 2536310757258, 7386317253546, 21510645891422]

cp's OEIS Frontend

A225920 a(n) is the least k such that f(a(n-1)+1) + ... + f(k) > f(a(n-2)+1) + ... + f(a(n-1)) for n > 1, where f(n) = 1/(n+5) and a(1) = 1.

Table of values

List of values