A245618 - cp's OEIS frontend

A245618 Triangle {H(n,k)} similar to Pascal's with sides of 1's, but interior entries are obtained by the rule: H(n,k) = |H(n-1,k)+(-1)^m(n,k)*H(n-1,k-1)|, where m(n,k) = H(n-1,k) + H(n-1,k-1).

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	1
8	1
9	1
10	1
11	2
12	2
13	2
14	1
15	1
16	1
17	4
18	4
19	1
20	1
21	1
22	2
23	3
24	8
25	3
26	2
27	1
28	1
29	1
30	1
31	5
32	5
33	1
34	1
35	1
36	1
37	2
38	2
39	6
40	10
41	6
42	2
43	2
44	1
45	1
46	1
47	4
48	8
49	16
50	16
51	8
52	4
53	1
54	1
55	1
56	2
57	3
58	12
59	24
60	32
61	24
62	12
63	3
64	2
65	1
66	1
67	1
68	1
69	9
70	36
71	56
72	56
73	36
74	9
75	1
76	1
77	1
78	1
79	2
80	2
81	10

[1, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1, 2, 2, 2, 1, 1, 1, 4, 4, 1, 1, 1, 2, 3, 8, 3, 2, 1, 1, 1, 1, 5, 5, 1, 1, 1, 1, 2, 2, 6, 10, 6, 2, 2, 1, 1, 1, 4, 8, 16, 16, 8, 4, 1, 1, 1, 2, 3, 12, 24, 32, 24, 12, 3, 2, 1, 1, 1, 1, 9, 36, 56, 56, 36, 9, 1, 1, 1, 1, 2, 2, 10]

cp's OEIS Frontend

A245618 Triangle {H(n,k)} similar to Pascal's with sides of 1's, but interior entries are obtained by the rule: H(n,k) = |H(n-1,k)+(-1)^m(n,k)*H(n-1,k-1)|, where m(n,k) = H(n-1,k) + H(n-1,k-1).

Table of values

List of values

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	1
8	1
9	1
10	1
11	2
12	2
13	2
14	1
15	1
16	1
17	4
18	4
19	1
20	1
21	1
22	2
23	3
24	8
25	3
26	2
27	1
28	1
29	1
30	1
31	5
32	5
33	1
34	1
35	1
36	1
37	2
38	2
39	6
40	10
41	6
42	2
43	2
44	1
45	1
46	1
47	4
48	8
49	16
50	16
51	8
52	4
53	1
54	1
55	1
56	2
57	3
58	12
59	24
60	32
61	24
62	12
63	3
64	2
65	1
66	1
67	1
68	1
69	9
70	36
71	56
72	56
73	36
74	9
75	1
76	1
77	1
78	1
79	2
80	2
81	10

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	1
8	1
9	1
10	1
11	2
12	2
13	2
14	1
15	1
16	1
17	4
18	4
19	1
20	1
21	1
22	2
23	3
24	8
25	3
26	2
27	1
28	1
29	1
30	1
31	5
32	5
33	1
34	1
35	1
36	1
37	2
38	2
39	6
40	10
41	6
42	2
43	2
44	1
45	1
46	1
47	4
48	8
49	16
50	16
51	8
52	4
53	1
54	1
55	1
56	2
57	3
58	12
59	24
60	32
61	24
62	12
63	3
64	2
65	1
66	1
67	1
68	1
69	9
70	36
71	56
72	56
73	36
74	9
75	1
76	1
77	1
78	1
79	2
80	2
81	10

n	a(n)
0	1
1	1
2	1
3	1
4	2
5	1
6	1
7	1
8	1
9	1
10	1
11	2
12	2
13	2
14	1
15	1
16	1
17	4
18	4
19	1
20	1
21	1
22	2
23	3
24	8
25	3
26	2
27	1
28	1
29	1
30	1
31	5
32	5
33	1
34	1
35	1
36	1
37	2
38	2
39	6
40	10
41	6
42	2
43	2
44	1
45	1
46	1
47	4
48	8
49	16
50	16
51	8
52	4
53	1
54	1
55	1
56	2
57	3
58	12
59	24
60	32
61	24
62	12
63	3
64	2
65	1
66	1
67	1
68	1
69	9
70	36
71	56
72	56
73	36
74	9
75	1
76	1
77	1
78	1
79	2
80	2
81	10