A065224 - cp's OEIS frontend

A065224 Fill a triangular array by rows by writing numbers 1 up to b(0), 1 up to b(1), etc., where b(n) are the octagonal numbers. The final elements of the rows form a(n).

n	a(n)
0	1
1	2
2	5
3	1
4	6
5	12
6	19
7	6
8	15
9	25
10	36
11	8
12	21
13	35
14	50
15	1
16	18
17	36
18	55
19	75
20	96
21	22
22	45
23	69
24	94
25	120
26	14
27	42
28	71
29	101
30	132
31	164
32	21
33	55
34	90
35	126
36	163
37	201
38	15
39	55
40	96
41	138
42	181
43	225
44	270
45	36
46	83
47	131
48	180
49	230
50	281
51	333
52	45
53	99
54	154
55	210
56	267
57	325
58	384
59	36
60	97
61	159
62	222

[1, 2, 5, 1, 6, 12, 19, 6, 15, 25, 36, 8, 21, 35, 50, 1, 18, 36, 55, 75, 96, 22, 45, 69, 94, 120, 14, 42, 71, 101, 132, 164, 21, 55, 90, 126, 163, 201, 15, 55, 96, 138, 181, 225, 270, 36, 83, 131, 180, 230, 281, 333, 45, 99, 154, 210, 267, 325, 384, 36, 97, 159, 222]

cp's OEIS Frontend

A065224 Fill a triangular array by rows by writing numbers 1 up to b(0), 1 up to b(1), etc., where b(n) are the octagonal numbers. The final elements of the rows form a(n).

Table of values

List of values

n	a(n)
0	1
1	2
2	5
3	1
4	6
5	12
6	19
7	6
8	15
9	25
10	36
11	8
12	21
13	35
14	50
15	1
16	18
17	36
18	55
19	75
20	96
21	22
22	45
23	69
24	94
25	120
26	14
27	42
28	71
29	101
30	132
31	164
32	21
33	55
34	90
35	126
36	163
37	201
38	15
39	55
40	96
41	138
42	181
43	225
44	270
45	36
46	83
47	131
48	180
49	230
50	281
51	333
52	45
53	99
54	154
55	210
56	267
57	325
58	384
59	36
60	97
61	159
62	222

n	a(n)
0	1
1	2
2	5
3	1
4	6
5	12
6	19
7	6
8	15
9	25
10	36
11	8
12	21
13	35
14	50
15	1
16	18
17	36
18	55
19	75
20	96
21	22
22	45
23	69
24	94
25	120
26	14
27	42
28	71
29	101
30	132
31	164
32	21
33	55
34	90
35	126
36	163
37	201
38	15
39	55
40	96
41	138
42	181
43	225
44	270
45	36
46	83
47	131
48	180
49	230
50	281
51	333
52	45
53	99
54	154
55	210
56	267
57	325
58	384
59	36
60	97
61	159
62	222

n	a(n)
0	1
1	2
2	5
3	1
4	6
5	12
6	19
7	6
8	15
9	25
10	36
11	8
12	21
13	35
14	50
15	1
16	18
17	36
18	55
19	75
20	96
21	22
22	45
23	69
24	94
25	120
26	14
27	42
28	71
29	101
30	132
31	164
32	21
33	55
34	90
35	126
36	163
37	201
38	15
39	55
40	96
41	138
42	181
43	225
44	270
45	36
46	83
47	131
48	180
49	230
50	281
51	333
52	45
53	99
54	154
55	210
56	267
57	325
58	384
59	36
60	97
61	159
62	222