A242490 - cp's OEIS frontend

A242490 Smallest even number k such that lpf(k-3) = prime(n) while lpf(k-1) > lpf(k-3), where lpf=least prime factor (A020639).

n	a(n)
2	6
3	8
4	80
5	14
6	224
7	20
8	440
9	854
10	32
11	1460
12	1742
13	44
14	2282
15	3434
16	4190
17	62
18	5432
19	4760
20	74
21	12194
22	8930
23	8054
24	12374
25	13292
26	104
27	15350
28	110
29	14282
30	31982
31	17402
32	18212
33	140
34	24050
35	152
36	25220
37	29990
38	28202
39	32234
40	33392
41	182
42	43262
43	194
44	44972
45	200
46	47564

[6, 8, 80, 14, 224, 20, 440, 854, 32, 1460, 1742, 44, 2282, 3434, 4190, 62, 5432, 4760, 74, 12194, 8930, 8054, 12374, 13292, 104, 15350, 110, 14282, 31982, 17402, 18212, 140, 24050, 152, 25220, 29990, 28202, 32234, 33392, 182, 43262, 194, 44972, 200, 47564]

cp's OEIS Frontend

A242490 Smallest even number k such that lpf(k-3) = prime(n) while lpf(k-1) > lpf(k-3), where lpf=least prime factor (A020639).

Table of values

List of values