A292770 - OEIS

A292770 as a simple table

n	a(n)
1	1
2	2
3	3
4	-1
5	5
6	7
7	7
8	-1
9	-1
10	11
11	11
12	16
13	13
14	15
15	16
16	-1
17	17
18	-1
19	19
20	25
21	22
22	23
23	23
24	34
25	-1
26	27
27	29
28	34
29	29
30	40
31	31
32	-1
33	34
34	35
35	36
36	-1
37	37
38	39
39	40
40	53
41	41
42	54
43	43
44	52
45	51
46	47
47	47
48	70
49	-1
50	-1
51	52
52	61
53	53
54	69
55	56
56	72
57	58
58	59
59	59
60	92
61	61
62	63
63	70
64	-1
65	66
66	82
67	67
68	79
69	70
70	84
71	71
72	-1
73	73
74	75
75	82
76	88
77	78
78	96

[1,2,3,-1,5,7,7,-1,-1,11,11,16,13,15,16,-1,17,-1, 19,25,22,23,23,34,-1,27,29,34,29,40,31,-1,34,35, 36,-1,37,39,40,53,41,54,43,52,51,47,47,70,-1,-1, 52,61,53,69,56,72,58,59,59,92,61,63,70,-1,66,82, 67,79,70,84,71,-1,73,75,82,88,78,96]

n	a(n)
1	1
2	2
3	3
4	-1
5	5
6	7
7	7
8	-1
9	-1
10	11
11	11
12	16
13	13
14	15
15	16
16	-1
17	17
18	-1
19	19
20	25
21	22
22	23
23	23
24	34
25	-1
26	27
27	29
28	34
29	29
30	40
31	31
32	-1
33	34
34	35
35	36
36	-1
37	37
38	39
39	40
40	53
41	41
42	54
43	43
44	52
45	51
46	47
47	47
48	70
49	-1
50	-1
51	52
52	61
53	53
54	69
55	56
56	72
57	58
58	59
59	59
60	92
61	61
62	63
63	70
64	-1
65	66
66	82
67	67
68	79
69	70
70	84
71	71
72	-1
73	73
74	75
75	82
76	88
77	78
78	96

n	a(n)
1	1
2	2
3	3
4	-1
5	5
6	7
7	7
8	-1
9	-1
10	11
11	11
12	16
13	13
14	15
15	16
16	-1
17	17
18	-1
19	19
20	25
21	22
22	23
23	23
24	34
25	-1
26	27
27	29
28	34
29	29
30	40
31	31
32	-1
33	34
34	35
35	36
36	-1
37	37
38	39
39	40
40	53
41	41
42	54
43	43
44	52
45	51
46	47
47	47
48	70
49	-1
50	-1
51	52
52	61
53	53
54	69
55	56
56	72
57	58
58	59
59	59
60	92
61	61
62	63
63	70
64	-1
65	66
66	82
67	67
68	79
69	70
70	84
71	71
72	-1
73	73
74	75
75	82
76	88
77	78
78	96

n	a(n)
1	1
2	2
3	3
4	-1
5	5
6	7
7	7
8	-1
9	-1
10	11
11	11
12	16
13	13
14	15
15	16
16	-1
17	17
18	-1
19	19
20	25
21	22
22	23
23	23
24	34
25	-1
26	27
27	29
28	34
29	29
30	40
31	31
32	-1
33	34
34	35
35	36
36	-1
37	37
38	39
39	40
40	53
41	41
42	54
43	43
44	52
45	51
46	47
47	47
48	70
49	-1
50	-1
51	52
52	61
53	53
54	69
55	56
56	72
57	58
58	59
59	59
60	92
61	61
62	63
63	70
64	-1
65	66
66	82
67	67
68	79
69	70
70	84
71	71
72	-1
73	73
74	75
75	82
76	88
77	78
78	96