A134398 - cp's OEIS frontend

A134398 Triangle read by rows: T(n, k) = (k-1)*(n-k) + binomial(n-1,k-1).

n	a(n)
1	1
2	1
3	1
4	1
5	3
6	1
7	1
8	5
9	5
10	1
11	1
12	7
13	10
14	7
15	1
16	1
17	9
18	16
19	16
20	9
21	1
22	1
23	11
24	23
25	29
26	23
27	11
28	1
29	1
30	13
31	31
32	47
33	47
34	31
35	13
36	1
37	1
38	15
39	40
40	71
41	86
42	71
43	40
44	15
45	1
46	1
47	17
48	50
49	102
50	146
51	146
52	102
53	50
54	17
55	1
56	1
57	19
58	61
59	141
60	234
61	277
62	234
63	141
64	61
65	19
66	1

[1, 1, 1, 1, 3, 1, 1, 5, 5, 1, 1, 7, 10, 7, 1, 1, 9, 16, 16, 9, 1, 1, 11, 23, 29, 23, 11, 1, 1, 13, 31, 47, 47, 31, 13, 1, 1, 15, 40, 71, 86, 71, 40, 15, 1, 1, 17, 50, 102, 146, 146, 102, 50, 17, 1, 1, 19, 61, 141, 234, 277, 234, 141, 61, 19, 1]

cp's OEIS Frontend

A134398 Triangle read by rows: T(n, k) = (k-1)*(n-k) + binomial(n-1,k-1).

Table of values

List of values

n	a(n)
1	1
2	1
3	1
4	1
5	3
6	1
7	1
8	5
9	5
10	1
11	1
12	7
13	10
14	7
15	1
16	1
17	9
18	16
19	16
20	9
21	1
22	1
23	11
24	23
25	29
26	23
27	11
28	1
29	1
30	13
31	31
32	47
33	47
34	31
35	13
36	1
37	1
38	15
39	40
40	71
41	86
42	71
43	40
44	15
45	1
46	1
47	17
48	50
49	102
50	146
51	146
52	102
53	50
54	17
55	1
56	1
57	19
58	61
59	141
60	234
61	277
62	234
63	141
64	61
65	19
66	1

n	a(n)
1	1
2	1
3	1
4	1
5	3
6	1
7	1
8	5
9	5
10	1
11	1
12	7
13	10
14	7
15	1
16	1
17	9
18	16
19	16
20	9
21	1
22	1
23	11
24	23
25	29
26	23
27	11
28	1
29	1
30	13
31	31
32	47
33	47
34	31
35	13
36	1
37	1
38	15
39	40
40	71
41	86
42	71
43	40
44	15
45	1
46	1
47	17
48	50
49	102
50	146
51	146
52	102
53	50
54	17
55	1
56	1
57	19
58	61
59	141
60	234
61	277
62	234
63	141
64	61
65	19
66	1

n	a(n)
1	1
2	1
3	1
4	1
5	3
6	1
7	1
8	5
9	5
10	1
11	1
12	7
13	10
14	7
15	1
16	1
17	9
18	16
19	16
20	9
21	1
22	1
23	11
24	23
25	29
26	23
27	11
28	1
29	1
30	13
31	31
32	47
33	47
34	31
35	13
36	1
37	1
38	15
39	40
40	71
41	86
42	71
43	40
44	15
45	1
46	1
47	17
48	50
49	102
50	146
51	146
52	102
53	50
54	17
55	1
56	1
57	19
58	61
59	141
60	234
61	277
62	234
63	141
64	61
65	19
66	1