A239563 - cp's OEIS frontend

A239563 Numbers n such that there are a, b with abs(sigma(a) - sigma(b)) = sigma(n) - n and a U b = n, where U is decimal concatenation.

n	a(n)
1	23
2	47
3	139
4	529
5	611
6	911
7	1109
8	1445
9	1621
10	2003
11	2521
12	2531
13	4007
14	4361
15	4879
16	7169
17	9011
18	9013
19	9481
20	13009
21	18883
22	22081
23	24257
24	25031
25	45349
26	49901
27	56081
28	90011
29	98941
30	99101
31	133705
32	160031
33	169181
34	200003
35	202289
36	210181
37	250031
38	307289
39	336961
40	357101

[23, 47, 139, 529, 611, 911, 1109, 1445, 1621, 2003, 2521, 2531, 4007, 4361, 4879, 7169, 9011, 9013, 9481, 13009, 18883, 22081, 24257, 25031, 45349, 49901, 56081, 90011, 98941, 99101, 133705, 160031, 169181, 200003, 202289, 210181, 250031, 307289, 336961, 357101]

cp's OEIS Frontend

A239563 Numbers n such that there are a, b with abs(sigma(a) - sigma(b)) = sigma(n) - n and a U b = n, where U is decimal concatenation.

Table of values

List of values