A064865 - cp's OEIS frontend

A064865 Fill a triangular array by rows by writing numbers 1, then 1 up to 2^2, then 1 up to 3^2, then 1 up to 4^2 and so on. The final elements of the rows form the sequence.

n	a(n)
1	1
2	2
3	1
4	5
5	1
6	7
7	14
8	6
9	15
10	25
11	11
12	23
13	36
14	14
15	29
16	45
17	13
18	31
19	50
20	6
21	27
22	49
23	72
24	15
25	40
26	66
27	93
28	21
29	50
30	80
31	111
32	22
33	55
34	89
35	124
36	16
37	53
38	91
39	130
40	1
41	42
42	84
43	127
44	171
45	20
46	66
47	113
48	161
49	210
50	35
51	86
52	138
53	191
54	245
55	44
56	100
57	157
58	215
59	274
60	45
61	106
62	168
63	231
64	295
65	36

[1, 2, 1, 5, 1, 7, 14, 6, 15, 25, 11, 23, 36, 14, 29, 45, 13, 31, 50, 6, 27, 49, 72, 15, 40, 66, 93, 21, 50, 80, 111, 22, 55, 89, 124, 16, 53, 91, 130, 1, 42, 84, 127, 171, 20, 66, 113, 161, 210, 35, 86, 138, 191, 245, 44, 100, 157, 215, 274, 45, 106, 168, 231, 295, 36]

cp's OEIS Frontend

A064865 Fill a triangular array by rows by writing numbers 1, then 1 up to 2^2, then 1 up to 3^2, then 1 up to 4^2 and so on. The final elements of the rows form the sequence.

Table of values

List of values

n	a(n)
1	1
2	2
3	1
4	5
5	1
6	7
7	14
8	6
9	15
10	25
11	11
12	23
13	36
14	14
15	29
16	45
17	13
18	31
19	50
20	6
21	27
22	49
23	72
24	15
25	40
26	66
27	93
28	21
29	50
30	80
31	111
32	22
33	55
34	89
35	124
36	16
37	53
38	91
39	130
40	1
41	42
42	84
43	127
44	171
45	20
46	66
47	113
48	161
49	210
50	35
51	86
52	138
53	191
54	245
55	44
56	100
57	157
58	215
59	274
60	45
61	106
62	168
63	231
64	295
65	36

n	a(n)
1	1
2	2
3	1
4	5
5	1
6	7
7	14
8	6
9	15
10	25
11	11
12	23
13	36
14	14
15	29
16	45
17	13
18	31
19	50
20	6
21	27
22	49
23	72
24	15
25	40
26	66
27	93
28	21
29	50
30	80
31	111
32	22
33	55
34	89
35	124
36	16
37	53
38	91
39	130
40	1
41	42
42	84
43	127
44	171
45	20
46	66
47	113
48	161
49	210
50	35
51	86
52	138
53	191
54	245
55	44
56	100
57	157
58	215
59	274
60	45
61	106
62	168
63	231
64	295
65	36

n	a(n)
1	1
2	2
3	1
4	5
5	1
6	7
7	14
8	6
9	15
10	25
11	11
12	23
13	36
14	14
15	29
16	45
17	13
18	31
19	50
20	6
21	27
22	49
23	72
24	15
25	40
26	66
27	93
28	21
29	50
30	80
31	111
32	22
33	55
34	89
35	124
36	16
37	53
38	91
39	130
40	1
41	42
42	84
43	127
44	171
45	20
46	66
47	113
48	161
49	210
50	35
51	86
52	138
53	191
54	245
55	44
56	100
57	157
58	215
59	274
60	45
61	106
62	168
63	231
64	295
65	36