A307117 - cp's OEIS frontend

A307117 Numbers x that are equal to lpf(x)gpf(x)(lpf(x)+gpf(x))/2, where lpf(x) and gpf(x) are the least and the greatest prime factors of x: A020639 and A006530.

n	a(n)
1	8
2	27
3	105
4	125
5	231
6	343
7	627
8	897
9	935
10	1331
11	1581
12	1729
13	2197
14	2465
15	2967
16	3525
17	4123
18	4301
19	4715
20	4913
21	5487
22	6859
23	7035
24	7685
25	7881
26	9717
27	10707
28	11339
29	12167
30	14993
31	16377
32	17353
33	17655
34	20213
35	20915
36	23779
37	24389
38	24765
39	25327
40	26331
41	26765
42	29341
43	29607

[8, 27, 105, 125, 231, 343, 627, 897, 935, 1331, 1581, 1729, 2197, 2465, 2967, 3525, 4123, 4301, 4715, 4913, 5487, 6859, 7035, 7685, 7881, 9717, 10707, 11339, 12167, 14993, 16377, 17353, 17655, 20213, 20915, 23779, 24389, 24765, 25327, 26331, 26765, 29341, 29607]

cp's OEIS Frontend

A307117 Numbers x that are equal to lpf(x)gpf(x)(lpf(x)+gpf(x))/2, where lpf(x) and gpf(x) are the least and the greatest prime factors of x: A020639 and A006530.

Table of values

List of values

cp's OEIS Frontend

A307117 Numbers x that are equal to lpf(x)*gpf(x)*(lpf(x)+gpf(x))/2, where lpf(x) and gpf(x) are the least and the greatest prime factors of x: A020639 and A006530.

Table of values

List of values

A307117 Numbers x that are equal to lpf(x)gpf(x)(lpf(x)+gpf(x))/2, where lpf(x) and gpf(x) are the least and the greatest prime factors of x: A020639 and A006530.