A231692 - cp's OEIS frontend

A231692 Define a sequence of rationals by f(0)=0, thereafter f(n)=f(n-1)-1/n if that is >= 0, otherwise f(n)=f(n-1)+1/n; a(n) = numerator of f(n).

n	a(n)
0	0
1	1
2	1
3	1
4	5
5	13
6	1
7	27
8	19
9	451
10	199
11	4709
12	2399
13	3467
14	29207
15	5183
16	55411
17	221267
18	300649
19	1628251
20	5508127
21	259001
22	762881
23	6460903
24	5694791
25	11476403
26	27820203
27	326206681
28	5151783667
29	69088293143
30	146724611903
31	2219373406193
32	8951357840311
33	4575492601111
34	328329280711
35	4454145077671

[0, 1, 1, 1, 5, 13, 1, 27, 19, 451, 199, 4709, 2399, 3467, 29207, 5183, 55411, 221267, 300649, 1628251, 5508127, 259001, 762881, 6460903, 5694791, 11476403, 27820203, 326206681, 5151783667, 69088293143, 146724611903, 2219373406193, 8951357840311, 4575492601111, 328329280711, 4454145077671]

cp's OEIS Frontend

A231692 Define a sequence of rationals by f(0)=0, thereafter f(n)=f(n-1)-1/n if that is >= 0, otherwise f(n)=f(n-1)+1/n; a(n) = numerator of f(n).

Table of values

List of values