A271647 - cp's OEIS frontend

A271647 Irregular triangle read by rows: the natural numbers from right to left.

n	a(n)
1	1
2	2
3	4
4	3
5	6
6	5
7	9
8	8
9	7
10	12
11	11
12	10
13	16
14	15
15	14
16	13
17	20
18	19
19	18
20	17
21	25
22	24
23	23
24	22
25	21
26	30
27	29
28	28
29	27
30	26
31	36
32	35
33	34
34	33
35	32
36	31
37	42
38	41
39	40
40	39
41	38
42	37
43	49
44	48
45	47
46	46
47	45
48	44
49	43
50	56
51	55
52	54
53	53
54	52
55	51
56	50
57	64
58	63
59	62
60	61
61	60
62	59
63	58
64	57

[1, 2, 4, 3, 6, 5, 9, 8, 7, 12, 11, 10, 16, 15, 14, 13, 20, 19, 18, 17, 25, 24, 23, 22, 21, 30, 29, 28, 27, 26, 36, 35, 34, 33, 32, 31, 42, 41, 40, 39, 38, 37, 49, 48, 47, 46, 45, 44, 43, 56, 55, 54, 53, 52, 51, 50, 64, 63, 62, 61, 60, 59, 58, 57]

cp's OEIS Frontend

A271647 Irregular triangle read by rows: the natural numbers from right to left.

Table of values

List of values

n	a(n)
1	1
2	2
3	4
4	3
5	6
6	5
7	9
8	8
9	7
10	12
11	11
12	10
13	16
14	15
15	14
16	13
17	20
18	19
19	18
20	17
21	25
22	24
23	23
24	22
25	21
26	30
27	29
28	28
29	27
30	26
31	36
32	35
33	34
34	33
35	32
36	31
37	42
38	41
39	40
40	39
41	38
42	37
43	49
44	48
45	47
46	46
47	45
48	44
49	43
50	56
51	55
52	54
53	53
54	52
55	51
56	50
57	64
58	63
59	62
60	61
61	60
62	59
63	58
64	57

n	a(n)
1	1
2	2
3	4
4	3
5	6
6	5
7	9
8	8
9	7
10	12
11	11
12	10
13	16
14	15
15	14
16	13
17	20
18	19
19	18
20	17
21	25
22	24
23	23
24	22
25	21
26	30
27	29
28	28
29	27
30	26
31	36
32	35
33	34
34	33
35	32
36	31
37	42
38	41
39	40
40	39
41	38
42	37
43	49
44	48
45	47
46	46
47	45
48	44
49	43
50	56
51	55
52	54
53	53
54	52
55	51
56	50
57	64
58	63
59	62
60	61
61	60
62	59
63	58
64	57

n	a(n)
1	1
2	2
3	4
4	3
5	6
6	5
7	9
8	8
9	7
10	12
11	11
12	10
13	16
14	15
15	14
16	13
17	20
18	19
19	18
20	17
21	25
22	24
23	23
24	22
25	21
26	30
27	29
28	28
29	27
30	26
31	36
32	35
33	34
34	33
35	32
36	31
37	42
38	41
39	40
40	39
41	38
42	37
43	49
44	48
45	47
46	46
47	45
48	44
49	43
50	56
51	55
52	54
53	53
54	52
55	51
56	50
57	64
58	63
59	62
60	61
61	60
62	59
63	58
64	57