A119457 - cp's OEIS frontend

A119457 Triangle read by rows: T(n, 1) = n, T(n, 2) = 2*(n-1) for n>1 and T(n, k) = T(n-1, k-1) + T(n-2, k-2) for 2 < k <= n.

n	a(n)
1	1
2	2
3	2
4	3
5	4
6	3
7	4
8	6
9	6
10	5
11	5
12	8
13	9
14	10
15	8
16	6
17	10
18	12
19	15
20	16
21	13
22	7
23	12
24	15
25	20
26	24
27	26
28	21
29	8
30	14
31	18
32	25
33	32
34	39
35	42
36	34
37	9
38	16
39	21
40	30
41	40
42	52
43	63
44	68
45	55
46	10
47	18
48	24
49	35
50	48
51	65
52	84
53	102
54	110
55	89
56	11
57	20
58	27
59	40
60	56
61	78
62	105
63	136
64	165
65	178
66	144
67	12
68	22
69	30
70	45
71	64
72	91
73	126
74	170
75	220
76	267
77	288
78	233

[1, 2, 2, 3, 4, 3, 4, 6, 6, 5, 5, 8, 9, 10, 8, 6, 10, 12, 15, 16, 13, 7, 12, 15, 20, 24, 26, 21, 8, 14, 18, 25, 32, 39, 42, 34, 9, 16, 21, 30, 40, 52, 63, 68, 55, 10, 18, 24, 35, 48, 65, 84, 102, 110, 89, 11, 20, 27, 40, 56, 78, 105, 136, 165, 178, 144, 12, 22, 30, 45, 64, 91, 126, 170, 220, 267, 288, 233]

cp's OEIS Frontend

A119457 Triangle read by rows: T(n, 1) = n, T(n, 2) = 2*(n-1) for n>1 and T(n, k) = T(n-1, k-1) + T(n-2, k-2) for 2 < k <= n.

Table of values

List of values

n	a(n)
1	1
2	2
3	2
4	3
5	4
6	3
7	4
8	6
9	6
10	5
11	5
12	8
13	9
14	10
15	8
16	6
17	10
18	12
19	15
20	16
21	13
22	7
23	12
24	15
25	20
26	24
27	26
28	21
29	8
30	14
31	18
32	25
33	32
34	39
35	42
36	34
37	9
38	16
39	21
40	30
41	40
42	52
43	63
44	68
45	55
46	10
47	18
48	24
49	35
50	48
51	65
52	84
53	102
54	110
55	89
56	11
57	20
58	27
59	40
60	56
61	78
62	105
63	136
64	165
65	178
66	144
67	12
68	22
69	30
70	45
71	64
72	91
73	126
74	170
75	220
76	267
77	288
78	233

n	a(n)
1	1
2	2
3	2
4	3
5	4
6	3
7	4
8	6
9	6
10	5
11	5
12	8
13	9
14	10
15	8
16	6
17	10
18	12
19	15
20	16
21	13
22	7
23	12
24	15
25	20
26	24
27	26
28	21
29	8
30	14
31	18
32	25
33	32
34	39
35	42
36	34
37	9
38	16
39	21
40	30
41	40
42	52
43	63
44	68
45	55
46	10
47	18
48	24
49	35
50	48
51	65
52	84
53	102
54	110
55	89
56	11
57	20
58	27
59	40
60	56
61	78
62	105
63	136
64	165
65	178
66	144
67	12
68	22
69	30
70	45
71	64
72	91
73	126
74	170
75	220
76	267
77	288
78	233

n	a(n)
1	1
2	2
3	2
4	3
5	4
6	3
7	4
8	6
9	6
10	5
11	5
12	8
13	9
14	10
15	8
16	6
17	10
18	12
19	15
20	16
21	13
22	7
23	12
24	15
25	20
26	24
27	26
28	21
29	8
30	14
31	18
32	25
33	32
34	39
35	42
36	34
37	9
38	16
39	21
40	30
41	40
42	52
43	63
44	68
45	55
46	10
47	18
48	24
49	35
50	48
51	65
52	84
53	102
54	110
55	89
56	11
57	20
58	27
59	40
60	56
61	78
62	105
63	136
64	165
65	178
66	144
67	12
68	22
69	30
70	45
71	64
72	91
73	126
74	170
75	220
76	267
77	288
78	233