A188176 - cp's OEIS frontend

A188176 Number of strictly increasing arrangements of n numbers in -(n+2)..(n+2) with sum zero.

n	a(n)
1	1
2	4
3	13
4	43
5	141
6	480
7	1656
8	5744
9	20094
10	70922
11	252117
12	901723
13	3243531
14	11728606
15	42611990
16	155484150
17	569585274
18	2094177794
19	7725489976
20	28588154238
21	106095329440
22	394792407478
23	1472734812454
24	5506709078310
25	20635115495666

[1, 4, 13, 43, 141, 480, 1656, 5744, 20094, 70922, 252117, 901723, 3243531, 11728606, 42611990, 155484150, 569585274, 2094177794, 7725489976, 28588154238, 106095329440, 394792407478, 1472734812454, 5506709078310, 20635115495666]

cp's OEIS Frontend

A188176 Number of strictly increasing arrangements of n numbers in -(n+2)..(n+2) with sum zero.

Table of values

List of values