A243803 - cp's OEIS frontend

A243803 Number of numbers k in interval [(p_n)^2+1, (p_n)^4] for which lpf(k-3)>lpf(k-1)>=p_n, where p_n=prime(n) and lpf = A020639.

n	a(n)
3	40
4	85
5	393
6	625
7	1557
8	2106
9	4069
10	9558
11	11476
12	22060
13	31530
14	35998
15	49142
16	76678
17	113799
18	125010
19	176824
20	216378
21	234064
22	313511
23	372054
24	481764
25	668344
26	768307
27	811635
28	926452
29	975785
30	1105924
31	1751993
32	1949976
33	2299392
34	2394921
35	3130534
36	3250605
37	3751262
38	4306910
39	4683674
40	5332960

[40, 85, 393, 625, 1557, 2106, 4069, 9558, 11476, 22060, 31530, 35998, 49142, 76678, 113799, 125010, 176824, 216378, 234064, 313511, 372054, 481764, 668344, 768307, 811635, 926452, 975785, 1105924, 1751993, 1949976, 2299392, 2394921, 3130534, 3250605, 3751262, 4306910, 4683674, 5332960]

cp's OEIS Frontend

A243803 Number of numbers k in interval [(p_n)^2+1, (p_n)^4] for which lpf(k-3)>lpf(k-1)>=p_n, where p_n=prime(n) and lpf = A020639.

Table of values

List of values