A246487 - cp's OEIS frontend

A246487 Numbers x such that sigma(x) + sigma(R(x)) = sigma(x + R(x)), where R(x) is the digit reversal of x and sigma(x) is the sum of the divisors of x.

n	a(n)
1	78
2	87
3	104
4	401
5	1144
6	2072
7	2178
8	2702
9	4411
10	7038
11	7348
12	7878
13	8307
14	8437
15	8712
16	8787
17	11144
18	11544
19	12584
20	15834
21	20710
22	20913
23	21476
24	21978
25	22164
26	26070
27	31902
28	43851
29	44111
30	44511
31	46122
32	48521
33	66649
34	67412
35	87912
36	94666
37	102786
38	122584
39	122784
40	126984

[78, 87, 104, 401, 1144, 2072, 2178, 2702, 4411, 7038, 7348, 7878, 8307, 8437, 8712, 8787, 11144, 11544, 12584, 15834, 20710, 20913, 21476, 21978, 22164, 26070, 31902, 43851, 44111, 44511, 46122, 48521, 66649, 67412, 87912, 94666, 102786, 122584, 122784, 126984]

cp's OEIS Frontend

A246487 Numbers x such that sigma(x) + sigma(R(x)) = sigma(x + R(x)), where R(x) is the digit reversal of x and sigma(x) is the sum of the divisors of x.

Table of values

List of values