A203614 - cp's OEIS frontend

A203614 For any number n take the polynomial formed by the product of the terms (x-pi), where pi’s are the prime factors of n. Then calculate the area between the minimum and the maximum value of the prime factors. This sequence lists the numbers for which the area is equal to zero.

n	a(n)
1	105
2	140
3	231
4	627
5	748
6	750
7	897
8	935
9	1470
10	1581
11	1729
12	2205
13	2465
14	2625
15	2967
16	3404
17	3549
18	4123
19	4301
20	4715
21	5452
22	5487
23	6256
24	7623
25	7685
26	7881
27	9009
28	9717
29	10707
30	10829
31	10988
32	11319
33	11339
34	13310
35	14993
36	15470
37	16377
38	17353
39	17457
40	17901
41	20213
42	20915

[105, 140, 231, 627, 748, 750, 897, 935, 1470, 1581, 1729, 2205, 2465, 2625, 2967, 3404, 3549, 4123, 4301, 4715, 5452, 5487, 6256, 7623, 7685, 7881, 9009, 9717, 10707, 10829, 10988, 11319, 11339, 13310, 14993, 15470, 16377, 17353, 17457, 17901, 20213, 20915]

cp's OEIS Frontend

A203614 For any number n take the polynomial formed by the product of the terms (x-pi), where pi’s are the prime factors of n. Then calculate the area between the minimum and the maximum value of the prime factors. This sequence lists the numbers for which the area is equal to zero.

Table of values

List of values