A188358 - cp's OEIS frontend

A188358 T(n,k)=Number of arrangements of n+1 numbers x(i) in -k..k with the sum of x(i)*x(i+1) equal to zero.

n	a(n)
1	5
2	9
3	15
4	13
5	45
6	29
7	17
8	91
9	117
10	91
11	21
12	153
13	257
14	565
15	197
16	25
17	231
18	497
19	1775
20	1953
21	627
22	29
23	325
24	749
25	4201
26	7369
27	9153
28	1477
29	33
30	435
31	1205
32	8051
33	22229
34	49747
35	37269
36	4671
37	37
38	561
39	1569
40	14477
41	45801
42	181449
43	262925
44	173409
45	11693
46	41
47	703
48	2161

[5, 9, 15, 13, 45, 29, 17, 91, 117, 91, 21, 153, 257, 565, 197, 25, 231, 497, 1775, 1953, 627, 29, 325, 749, 4201, 7369, 9153, 1477, 33, 435, 1205, 8051, 22229, 49747, 37269, 4671, 37, 561, 1569, 14477, 45801, 181449, 262925, 173409, 11693, 41, 703, 2161]

cp's OEIS Frontend

A188358 T(n,k)=Number of arrangements of n+1 numbers x(i) in -k..k with the sum of x(i)*x(i+1) equal to zero.

Table of values

List of values