A376180 - cp's OEIS frontend

A376180 Triangle read by rows (blocks). Each row consists of a permutation of the numbers of its constituents. The length of row number n is the n-th pentagonal number n(3n-1)/2 = A000326(n); see Comments.

n	a(n)
1	1
2	4
3	5
4	3
5	6
6	2
7	13
8	12
9	14
10	11
11	15
12	10
13	16
14	9
15	17
16	8
17	18
18	7
19	30
20	29
21	31
22	28
23	32
24	27
25	33
26	26
27	34
28	25
29	35
30	24
31	36
32	23
33	37
34	22
35	38
36	21
37	39
38	20
39	40
40	19
41	58
42	59
43	57
44	60
45	56
46	61
47	55
48	62
49	54
50	63
51	53
52	64
53	52
54	65
55	51
56	66
57	50
58	67
59	49
60	68
61	48
62	69
63	47
64	70
65	46
66	71
67	45
68	72
69	44
70	73
71	43
72	74
73	42
74	75
75	41
76	101
77	102
78	100
79	103
80	99
81	104
82	98
83	105
84	97
85	106
86	96
87	107

[1, 4, 5, 3, 6, 2, 13, 12, 14, 11, 15, 10, 16, 9, 17, 8, 18, 7, 30, 29, 31, 28, 32, 27, 33, 26, 34, 25, 35, 24, 36, 23, 37, 22, 38, 21, 39, 20, 40, 19, 58, 59, 57, 60, 56, 61, 55, 62, 54, 63, 53, 64, 52, 65, 51, 66, 50, 67, 49, 68, 48, 69, 47, 70, 46, 71, 45, 72, 44, 73, 43, 74, 42, 75, 41, 101, 102, 100, 103, 99, 104, 98, 105, 97, 106, 96, 107]

cp's OEIS Frontend

A376180 Triangle read by rows (blocks). Each row consists of a permutation of the numbers of its constituents. The length of row number n is the n-th pentagonal number n(3n-1)/2 = A000326(n); see Comments.

Table of values

List of values

n	a(n)
1	1
2	4
3	5
4	3
5	6
6	2
7	13
8	12
9	14
10	11
11	15
12	10
13	16
14	9
15	17
16	8
17	18
18	7
19	30
20	29
21	31
22	28
23	32
24	27
25	33
26	26
27	34
28	25
29	35
30	24
31	36
32	23
33	37
34	22
35	38
36	21
37	39
38	20
39	40
40	19
41	58
42	59
43	57
44	60
45	56
46	61
47	55
48	62
49	54
50	63
51	53
52	64
53	52
54	65
55	51
56	66
57	50
58	67
59	49
60	68
61	48
62	69
63	47
64	70
65	46
66	71
67	45
68	72
69	44
70	73
71	43
72	74
73	42
74	75
75	41
76	101
77	102
78	100
79	103
80	99
81	104
82	98
83	105
84	97
85	106
86	96
87	107

n	a(n)
1	1
2	4
3	5
4	3
5	6
6	2
7	13
8	12
9	14
10	11
11	15
12	10
13	16
14	9
15	17
16	8
17	18
18	7
19	30
20	29
21	31
22	28
23	32
24	27
25	33
26	26
27	34
28	25
29	35
30	24
31	36
32	23
33	37
34	22
35	38
36	21
37	39
38	20
39	40
40	19
41	58
42	59
43	57
44	60
45	56
46	61
47	55
48	62
49	54
50	63
51	53
52	64
53	52
54	65
55	51
56	66
57	50
58	67
59	49
60	68
61	48
62	69
63	47
64	70
65	46
66	71
67	45
68	72
69	44
70	73
71	43
72	74
73	42
74	75
75	41
76	101
77	102
78	100
79	103
80	99
81	104
82	98
83	105
84	97
85	106
86	96
87	107

n	a(n)
1	1
2	4
3	5
4	3
5	6
6	2
7	13
8	12
9	14
10	11
11	15
12	10
13	16
14	9
15	17
16	8
17	18
18	7
19	30
20	29
21	31
22	28
23	32
24	27
25	33
26	26
27	34
28	25
29	35
30	24
31	36
32	23
33	37
34	22
35	38
36	21
37	39
38	20
39	40
40	19
41	58
42	59
43	57
44	60
45	56
46	61
47	55
48	62
49	54
50	63
51	53
52	64
53	52
54	65
55	51
56	66
57	50
58	67
59	49
60	68
61	48
62	69
63	47
64	70
65	46
66	71
67	45
68	72
69	44
70	73
71	43
72	74
73	42
74	75
75	41
76	101
77	102
78	100
79	103
80	99
81	104
82	98
83	105
84	97
85	106
86	96
87	107