A065229 - cp's OEIS frontend

A065229 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 pentagonal numbers. The first elements of the rows form a(n).

n	a(n)
0	1
1	1
2	3
3	1
4	5
5	10
6	4
7	11
8	19
9	6
10	16
11	27
12	4
13	17
14	31
15	46
16	11
17	28
18	46
19	65
20	15
21	36
22	58
23	81
24	13
25	38
26	64
27	91
28	2
29	31
30	61
31	92
32	124
33	12
34	46
35	81
36	117
37	154
38	16
39	55
40	95
41	136
42	178
43	11
44	55
45	100
46	146
47	193
48	241
49	43
50	93
51	144
52	196
53	249
54	16
55	71
56	127
57	184
58	242
59	301
60	31
61	92
62	154
63	217
64	281
65	346

[1, 1, 3, 1, 5, 10, 4, 11, 19, 6, 16, 27, 4, 17, 31, 46, 11, 28, 46, 65, 15, 36, 58, 81, 13, 38, 64, 91, 2, 31, 61, 92, 124, 12, 46, 81, 117, 154, 16, 55, 95, 136, 178, 11, 55, 100, 146, 193, 241, 43, 93, 144, 196, 249, 16, 71, 127, 184, 242, 301, 31, 92, 154, 217, 281, 346]

cp's OEIS Frontend

A065229 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 pentagonal numbers. The first elements of the rows form a(n).

Table of values

List of values

n	a(n)
0	1
1	1
2	3
3	1
4	5
5	10
6	4
7	11
8	19
9	6
10	16
11	27
12	4
13	17
14	31
15	46
16	11
17	28
18	46
19	65
20	15
21	36
22	58
23	81
24	13
25	38
26	64
27	91
28	2
29	31
30	61
31	92
32	124
33	12
34	46
35	81
36	117
37	154
38	16
39	55
40	95
41	136
42	178
43	11
44	55
45	100
46	146
47	193
48	241
49	43
50	93
51	144
52	196
53	249
54	16
55	71
56	127
57	184
58	242
59	301
60	31
61	92
62	154
63	217
64	281
65	346

n	a(n)
0	1
1	1
2	3
3	1
4	5
5	10
6	4
7	11
8	19
9	6
10	16
11	27
12	4
13	17
14	31
15	46
16	11
17	28
18	46
19	65
20	15
21	36
22	58
23	81
24	13
25	38
26	64
27	91
28	2
29	31
30	61
31	92
32	124
33	12
34	46
35	81
36	117
37	154
38	16
39	55
40	95
41	136
42	178
43	11
44	55
45	100
46	146
47	193
48	241
49	43
50	93
51	144
52	196
53	249
54	16
55	71
56	127
57	184
58	242
59	301
60	31
61	92
62	154
63	217
64	281
65	346

n	a(n)
0	1
1	1
2	3
3	1
4	5
5	10
6	4
7	11
8	19
9	6
10	16
11	27
12	4
13	17
14	31
15	46
16	11
17	28
18	46
19	65
20	15
21	36
22	58
23	81
24	13
25	38
26	64
27	91
28	2
29	31
30	61
31	92
32	124
33	12
34	46
35	81
36	117
37	154
38	16
39	55
40	95
41	136
42	178
43	11
44	55
45	100
46	146
47	193
48	241
49	43
50	93
51	144
52	196
53	249
54	16
55	71
56	127
57	184
58	242
59	301
60	31
61	92
62	154
63	217
64	281
65	346