A065223 - cp's OEIS frontend

A065223 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 heptagonal numbers (A000566). The final elements of the rows form a(n).

n	a(n)
0	1
1	2
2	5
3	2
4	7
5	13
6	2
7	10
8	19
9	29
10	6
11	18
12	31
13	45
14	5
15	21
16	38
17	56
18	75
19	14
20	35
21	57
22	80
23	104
24	17
25	43
26	70
27	98
28	127
29	9
30	40
31	72
32	105
33	139
34	174
35	21
36	58
37	96
38	135
39	175
40	216
41	23
42	66
43	110
44	155
45	201
46	248
47	10
48	59
49	109
50	160
51	212
52	265
53	319
54	32
55	88
56	145
57	203
58	262
59	322
60	383
61	42
62	105

[1, 2, 5, 2, 7, 13, 2, 10, 19, 29, 6, 18, 31, 45, 5, 21, 38, 56, 75, 14, 35, 57, 80, 104, 17, 43, 70, 98, 127, 9, 40, 72, 105, 139, 174, 21, 58, 96, 135, 175, 216, 23, 66, 110, 155, 201, 248, 10, 59, 109, 160, 212, 265, 319, 32, 88, 145, 203, 262, 322, 383, 42, 105]

cp's OEIS Frontend

A065223 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 heptagonal numbers (A000566). 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	2
4	7
5	13
6	2
7	10
8	19
9	29
10	6
11	18
12	31
13	45
14	5
15	21
16	38
17	56
18	75
19	14
20	35
21	57
22	80
23	104
24	17
25	43
26	70
27	98
28	127
29	9
30	40
31	72
32	105
33	139
34	174
35	21
36	58
37	96
38	135
39	175
40	216
41	23
42	66
43	110
44	155
45	201
46	248
47	10
48	59
49	109
50	160
51	212
52	265
53	319
54	32
55	88
56	145
57	203
58	262
59	322
60	383
61	42
62	105

n	a(n)
0	1
1	2
2	5
3	2
4	7
5	13
6	2
7	10
8	19
9	29
10	6
11	18
12	31
13	45
14	5
15	21
16	38
17	56
18	75
19	14
20	35
21	57
22	80
23	104
24	17
25	43
26	70
27	98
28	127
29	9
30	40
31	72
32	105
33	139
34	174
35	21
36	58
37	96
38	135
39	175
40	216
41	23
42	66
43	110
44	155
45	201
46	248
47	10
48	59
49	109
50	160
51	212
52	265
53	319
54	32
55	88
56	145
57	203
58	262
59	322
60	383
61	42
62	105

n	a(n)
0	1
1	2
2	5
3	2
4	7
5	13
6	2
7	10
8	19
9	29
10	6
11	18
12	31
13	45
14	5
15	21
16	38
17	56
18	75
19	14
20	35
21	57
22	80
23	104
24	17
25	43
26	70
27	98
28	127
29	9
30	40
31	72
32	105
33	139
34	174
35	21
36	58
37	96
38	135
39	175
40	216
41	23
42	66
43	110
44	155
45	201
46	248
47	10
48	59
49	109
50	160
51	212
52	265
53	319
54	32
55	88
56	145
57	203
58	262
59	322
60	383
61	42
62	105