A384704 - cp's OEIS frontend

A384704 Triangle T(i, j), 1 <= j <= i, read by rows. T(i, j) is the smallest number k that has i odd divisors and whose symmetric representation of sigma, SRS(k), has j parts; when no such k exists then T(i, j) = -1.

n	a(n)
1	1
2	6
3	3
4	18
5	-1
6	9
7	30
8	78
9	15
10	21
11	162
12	-1
13	-1
14	-1
15	81
16	90
17	666
18	45
19	75
20	63
21	147
22	1458
23	-1
24	-1
25	-1
26	-1
27	-1
28	729
29	210
30	1830
31	135
32	105
33	165
34	189
35	357
36	903
37	450
38	-1
39	225
40	-1
41	1225
42	-1
43	441
44	-1
45	3025
46	810
47	53622
48	405
49	-1
50	1377
51	1875
52	567
53	1539
54	4779
55	6875
56	118098
57	-1
58	-1
59	-1
60	-1
61	-1
62	-1
63	-1
64	-1
65	-1
66	59049

[1, 6, 3, 18, -1, 9, 30, 78, 15, 21, 162, -1, -1, -1, 81, 90, 666, 45, 75, 63, 147, 1458, -1, -1, -1, -1, -1, 729, 210, 1830, 135, 105, 165, 189, 357, 903, 450, -1, 225, -1, 1225, -1, 441, -1, 3025, 810, 53622, 405, -1, 1377, 1875, 567, 1539, 4779, 6875, 118098, -1, -1, -1, -1, -1, -1, -1, -1, -1, 59049]

cp's OEIS Frontend

A384704 Triangle T(i, j), 1 <= j <= i, read by rows. T(i, j) is the smallest number k that has i odd divisors and whose symmetric representation of sigma, SRS(k), has j parts; when no such k exists then T(i, j) = -1.

Table of values

List of values