A305257 - cp's OEIS frontend

A305257 If pd(x) is the product of the digits of the number x and sd(x) the sum of the digits of the number x then the sequence lists all the positive numbers n for which pd(n) = sd(n) and sd(pd(n)) = pd(sd(n)).

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	22
11	123
12	132
13	213
14	231
15	312
16	321
17	1124
18	1142
19	1214
20	1241
21	1412
22	1421
23	2114
24	2141
25	2411
26	4112
27	4121
28	4211
29	11133
30	11222
31	11313
32	11331
33	12122
34	12212
35	12221
36	13113
37	13131
38	13311
39	21122
40	21212
41	21221
42	22112
43	22121
44	22211
45	31113
46	31131
47	31311
48	33111

[1, 2, 3, 4, 5, 6, 7, 8, 9, 22, 123, 132, 213, 231, 312, 321, 1124, 1142, 1214, 1241, 1412, 1421, 2114, 2141, 2411, 4112, 4121, 4211, 11133, 11222, 11313, 11331, 12122, 12212, 12221, 13113, 13131, 13311, 21122, 21212, 21221, 22112, 22121, 22211, 31113, 31131, 31311, 33111]

cp's OEIS Frontend

A305257 If pd(x) is the product of the digits of the number x and sd(x) the sum of the digits of the number x then the sequence lists all the positive numbers n for which pd(n) = sd(n) and sd(pd(n)) = pd(sd(n)).

Table of values

List of values