A307108 - cp's OEIS frontend

A307108 Numbers x that are equal to lpf(x)gpf(x)(lpf(x)+gpf(x))/2, where lpf(x) < gpf(x) are the least and the greatest prime factors of x: A020639 and A006530.

n	a(n)
1	105
2	231
3	627
4	897
5	935
6	1581
7	1729
8	2465
9	2967
10	3525
11	4123
12	4301
13	4715
14	5487
15	7035
16	7685
17	7881
18	9717
19	10707
20	11339
21	14993
22	16377
23	17353
24	17655
25	20213
26	20915
27	23779
28	24765
29	25327
30	26331
31	26765
32	29341
33	29607
34	32021
35	33335
36	34881
37	40587
38	40807
39	42585
40	42911
41	48635

[105, 231, 627, 897, 935, 1581, 1729, 2465, 2967, 3525, 4123, 4301, 4715, 5487, 7035, 7685, 7881, 9717, 10707, 11339, 14993, 16377, 17353, 17655, 20213, 20915, 23779, 24765, 25327, 26331, 26765, 29341, 29607, 32021, 33335, 34881, 40587, 40807, 42585, 42911, 48635]

cp's OEIS Frontend

A307108 Numbers x that are equal to lpf(x)gpf(x)(lpf(x)+gpf(x))/2, where lpf(x) < 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

A307108 Numbers x that are equal to lpf(x)*gpf(x)*(lpf(x)+gpf(x))/2, where lpf(x) < gpf(x) are the least and the greatest prime factors of x: A020639 and A006530.

Table of values

List of values

A307108 Numbers x that are equal to lpf(x)gpf(x)(lpf(x)+gpf(x))/2, where lpf(x) < gpf(x) are the least and the greatest prime factors of x: A020639 and A006530.