A225919 - cp's OEIS frontend

A225919 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+4) and a(1) = 1.

n	a(n)
1	1
2	11
3	40
4	124
5	367
6	1070
7	3104
8	8989
9	26016
10	75280
11	217815
12	630210
13	1823388
14	5275597
15	15263836
16	44162700
17	127775471
18	369691398
19	1069624136
20	3094731965
21	8953954568
22	25906380024
23	74954649447
24	216865477466
25	627454543012
26	1815407450477
27	5252498763364
28	15196997925652

[1, 11, 40, 124, 367, 1070, 3104, 8989, 26016, 75280, 217815, 630210, 1823388, 5275597, 15263836, 44162700, 127775471, 369691398, 1069624136, 3094731965, 8953954568, 25906380024, 74954649447, 216865477466, 627454543012, 1815407450477, 5252498763364, 15196997925652]

cp's OEIS Frontend

A225919 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+4) and a(1) = 1.

Table of values

List of values