A007603 - cp's OEIS frontend

A007603 Power-sum numbers: let n = a_1 a_2 ... a_k be a k-digit number; n is a power-sum number if there are exponents e_1 ... e_m such that n = Sum_{i=1..m} Sum_{j=1..k} a_j^e_i.

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	12
12	18
13	20
14	21
15	23
16	24
17	27
18	30
19	36
20	40
21	42
22	45
23	48
24	50
25	54
26	60
27	63
28	70
29	72
30	80
31	81
32	84
33	90
34	100
35	102
36	104
37	108
38	110
39	111
40	112
41	113
42	114
43	115
44	116
45	117
46	120
47	122
48	126
49	130
50	131
51	132
52	133
53	134
54	135
55	136
56	140
57	144
58	150
59	151
60	152
61	153
62	154
63	156
64	160
65	162
66	170
67	171
68	172
69	173
70	174
71	178
72	180
73	182

[1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 12, 18, 20, 21, 23, 24, 27, 30, 36, 40, 42, 45, 48, 50, 54, 60, 63, 70, 72, 80, 81, 84, 90, 100, 102, 104, 108, 110, 111, 112, 113, 114, 115, 116, 117, 120, 122, 126, 130, 131, 132, 133, 134, 135, 136, 140, 144, 150, 151, 152, 153, 154, 156, 160, 162, 170, 171, 172, 173, 174, 178, 180, 182]

cp's OEIS Frontend

A007603 Power-sum numbers: let n = a_1 a_2 ... a_k be a k-digit number; n is a power-sum number if there are exponents e_1 ... e_m such that n = Sum_{i=1..m} Sum_{j=1..k} a_j^e_i.

Table of values

List of values

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	12
12	18
13	20
14	21
15	23
16	24
17	27
18	30
19	36
20	40
21	42
22	45
23	48
24	50
25	54
26	60
27	63
28	70
29	72
30	80
31	81
32	84
33	90
34	100
35	102
36	104
37	108
38	110
39	111
40	112
41	113
42	114
43	115
44	116
45	117
46	120
47	122
48	126
49	130
50	131
51	132
52	133
53	134
54	135
55	136
56	140
57	144
58	150
59	151
60	152
61	153
62	154
63	156
64	160
65	162
66	170
67	171
68	172
69	173
70	174
71	178
72	180
73	182

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	12
12	18
13	20
14	21
15	23
16	24
17	27
18	30
19	36
20	40
21	42
22	45
23	48
24	50
25	54
26	60
27	63
28	70
29	72
30	80
31	81
32	84
33	90
34	100
35	102
36	104
37	108
38	110
39	111
40	112
41	113
42	114
43	115
44	116
45	117
46	120
47	122
48	126
49	130
50	131
51	132
52	133
53	134
54	135
55	136
56	140
57	144
58	150
59	151
60	152
61	153
62	154
63	156
64	160
65	162
66	170
67	171
68	172
69	173
70	174
71	178
72	180
73	182

n	a(n)
1	1
2	2
3	3
4	4
5	5
6	6
7	7
8	8
9	9
10	10
11	12
12	18
13	20
14	21
15	23
16	24
17	27
18	30
19	36
20	40
21	42
22	45
23	48
24	50
25	54
26	60
27	63
28	70
29	72
30	80
31	81
32	84
33	90
34	100
35	102
36	104
37	108
38	110
39	111
40	112
41	113
42	114
43	115
44	116
45	117
46	120
47	122
48	126
49	130
50	131
51	132
52	133
53	134
54	135
55	136
56	140
57	144
58	150
59	151
60	152
61	153
62	154
63	156
64	160
65	162
66	170
67	171
68	172
69	173
70	174
71	178
72	180
73	182