A199898 - cp's OEIS frontend

A199898 T(n,k)=Number of -k..k arrays x(0..n-1) of n elements with zero sum, and adjacent elements not both strictly positive and not both strictly negative.

n	a(n)
1	1
2	1
3	3
4	1
5	5
6	7
7	1
8	7
9	15
10	15
11	1
12	9
13	25
14	49
15	33
16	1
17	11
18	37
19	111
20	159
21	75
22	1
23	13
24	51
25	209
26	461
27	533
28	171
29	1
30	15
31	67
32	351
33	1043
34	2035
35	1783
36	391
37	1
38	17
39	85
40	545
41	2031
42	5725
43	8823
44	6027
45	899
46	1
47	19
48	105
49	799
50	3573
51	13363
52	30199
53	39053
54	20437
55	2077
56	1
57	21
58	127
59	1121
60	5839

[1, 1, 3, 1, 5, 7, 1, 7, 15, 15, 1, 9, 25, 49, 33, 1, 11, 37, 111, 159, 75, 1, 13, 51, 209, 461, 533, 171, 1, 15, 67, 351, 1043, 2035, 1783, 391, 1, 17, 85, 545, 2031, 5725, 8823, 6027, 899, 1, 19, 105, 799, 3573, 13363, 30199, 39053, 20437, 2077, 1, 21, 127, 1121, 5839]

cp's OEIS Frontend

A199898 T(n,k)=Number of -k..k arrays x(0..n-1) of n elements with zero sum, and adjacent elements not both strictly positive and not both strictly negative.

Table of values

List of values