A066923 - cp's OEIS frontend

A066923 Let f(x) = phi(x) + sigma(x); a(n) = least k such that at k begins a maximal run of length n of consecutive strict local extrema of f, or 0 if no such k exists.

n	a(n)
1	118
2	12
3	443
4	190
5	40
6	16
7	5847
8	180
9	108
10	48
11	1427
12	670510
13	2388
14	228
15	407
16	1577
17	424
18	2500
19	2500383
20	22848
21	4853
22	1240
23	323975
24	0
25	10668
26	588
27	10727
28	45677
29	18713
30	1903672
31	0
32	0
33	119028
34	18880
35	391659
36	0
37	883428
38	480036
39	1635467
40	896933
41	50380

[118, 12, 443, 190, 40, 16, 5847, 180, 108, 48, 1427, 670510, 2388, 228, 407, 1577, 424, 2500, 2500383, 22848, 4853, 1240, 323975, 0, 10668, 588, 10727, 45677, 18713, 1903672, 0, 0, 119028, 18880, 391659, 0, 883428, 480036, 1635467, 896933, 50380]

cp's OEIS Frontend

A066923 Let f(x) = phi(x) + sigma(x); a(n) = least k such that at k begins a maximal run of length n of consecutive strict local extrema of f, or 0 if no such k exists.

Table of values

List of values