A322782 - cp's OEIS frontend

A322782 Number of lattice paths from {2}^n to {0}^n using steps that decrement one component by 1 such that for each point (p_1,p_2,...,p_n) we have abs(p_{i}-p_{i+1}) <= 1 and abs(p_{1}-p_{n}) <= 1.

n	a(n)
0	1
1	1
2	4
3	36
4	720
5	23400
6	1123200
7	74440800
8	6509318400
9	725829724800
10	100511918784000
11	16922530756454400
12	3404178048774758400
13	806369627582929612800
14	222159405758654317363200
15	70435689828806256514560000
16	25463217531292911649057996800
17	10411540182139235537714555289600

[1, 1, 4, 36, 720, 23400, 1123200, 74440800, 6509318400, 725829724800, 100511918784000, 16922530756454400, 3404178048774758400, 806369627582929612800, 222159405758654317363200, 70435689828806256514560000, 25463217531292911649057996800, 10411540182139235537714555289600]

cp's OEIS Frontend

A322782 Number of lattice paths from {2}^n to {0}^n using steps that decrement one component by 1 such that for each point (p_1,p_2,...,p_n) we have abs(p_{i}-p_{i+1}) <= 1 and abs(p_{1}-p_{n}) <= 1.

Table of values

List of values