A308727 - cp's OEIS frontend

A308727 Lexicographically earliest sequence of distinct terms such that the digits of two contiguous terms sum up to a square.

n	a(n)
1	1
2	3
3	6
4	12
5	10
6	8
7	17
8	26
9	35
10	44
11	53
12	62
13	71
14	80
15	89
16	107
17	98
18	116
19	100
20	21
21	15
22	19
23	24
24	28
25	33
26	30
27	42
28	37
29	51
30	46
31	60
32	55
33	69
34	64
35	78
36	73
37	87
38	82
39	96
40	91
41	105
42	102
43	49
44	39
45	4
46	5
47	13
48	14
49	22
50	23
51	29
52	32
53	31
54	41
55	38
56	50
57	40
58	48
59	58
60	57
61	67
62	66
63	76
64	75
65	85
66	84
67	94
68	93
69	103
70	104
71	47
72	59
73	2
74	7
75	9
76	16
77	11
78	20
79	25
80	18
81	34
82	27
83	43
84	36
85	52

[1, 3, 6, 12, 10, 8, 17, 26, 35, 44, 53, 62, 71, 80, 89, 107, 98, 116, 100, 21, 15, 19, 24, 28, 33, 30, 42, 37, 51, 46, 60, 55, 69, 64, 78, 73, 87, 82, 96, 91, 105, 102, 49, 39, 4, 5, 13, 14, 22, 23, 29, 32, 31, 41, 38, 50, 40, 48, 58, 57, 67, 66, 76, 75, 85, 84, 94, 93, 103, 104, 47, 59, 2, 7, 9, 16, 11, 20, 25, 18, 34, 27, 43, 36, 52]

cp's OEIS Frontend

A308727 Lexicographically earliest sequence of distinct terms such that the digits of two contiguous terms sum up to a square.

Table of values

List of values

n	a(n)
1	1
2	3
3	6
4	12
5	10
6	8
7	17
8	26
9	35
10	44
11	53
12	62
13	71
14	80
15	89
16	107
17	98
18	116
19	100
20	21
21	15
22	19
23	24
24	28
25	33
26	30
27	42
28	37
29	51
30	46
31	60
32	55
33	69
34	64
35	78
36	73
37	87
38	82
39	96
40	91
41	105
42	102
43	49
44	39
45	4
46	5
47	13
48	14
49	22
50	23
51	29
52	32
53	31
54	41
55	38
56	50
57	40
58	48
59	58
60	57
61	67
62	66
63	76
64	75
65	85
66	84
67	94
68	93
69	103
70	104
71	47
72	59
73	2
74	7
75	9
76	16
77	11
78	20
79	25
80	18
81	34
82	27
83	43
84	36
85	52

n	a(n)
1	1
2	3
3	6
4	12
5	10
6	8
7	17
8	26
9	35
10	44
11	53
12	62
13	71
14	80
15	89
16	107
17	98
18	116
19	100
20	21
21	15
22	19
23	24
24	28
25	33
26	30
27	42
28	37
29	51
30	46
31	60
32	55
33	69
34	64
35	78
36	73
37	87
38	82
39	96
40	91
41	105
42	102
43	49
44	39
45	4
46	5
47	13
48	14
49	22
50	23
51	29
52	32
53	31
54	41
55	38
56	50
57	40
58	48
59	58
60	57
61	67
62	66
63	76
64	75
65	85
66	84
67	94
68	93
69	103
70	104
71	47
72	59
73	2
74	7
75	9
76	16
77	11
78	20
79	25
80	18
81	34
82	27
83	43
84	36
85	52

n	a(n)
1	1
2	3
3	6
4	12
5	10
6	8
7	17
8	26
9	35
10	44
11	53
12	62
13	71
14	80
15	89
16	107
17	98
18	116
19	100
20	21
21	15
22	19
23	24
24	28
25	33
26	30
27	42
28	37
29	51
30	46
31	60
32	55
33	69
34	64
35	78
36	73
37	87
38	82
39	96
40	91
41	105
42	102
43	49
44	39
45	4
46	5
47	13
48	14
49	22
50	23
51	29
52	32
53	31
54	41
55	38
56	50
57	40
58	48
59	58
60	57
61	67
62	66
63	76
64	75
65	85
66	84
67	94
68	93
69	103
70	104
71	47
72	59
73	2
74	7
75	9
76	16
77	11
78	20
79	25
80	18
81	34
82	27
83	43
84	36
85	52