A284461 - cp's OEIS frontend

A284461 Number of self-avoiding planar walks starting at (0,0), ending at (n,n), remaining in the first quadrant and using steps (0,1), (1,0), (1,1), (-1,1), and (1,-1) with the restriction that (0,1) is never used below the diagonal and (1,0) is never used above the diagonal.

n	a(n)
0	1
1	5
2	111
3	5127
4	400593
5	47311677
6	7857786015
7	1745000283087
8	499180661754849
9	178734707493557301
10	78294815164675006479
11	41186656484051421462615
12	25619826402721039367943729
13	18600984174200732870460447213
14	15588291843672510150758754601407

[1, 5, 111, 5127, 400593, 47311677, 7857786015, 1745000283087, 499180661754849, 178734707493557301, 78294815164675006479, 41186656484051421462615, 25619826402721039367943729, 18600984174200732870460447213, 15588291843672510150758754601407]

cp's OEIS Frontend

A284461 Number of self-avoiding planar walks starting at (0,0), ending at (n,n), remaining in the first quadrant and using steps (0,1), (1,0), (1,1), (-1,1), and (1,-1) with the restriction that (0,1) is never used below the diagonal and (1,0) is never used above the diagonal.

Table of values

List of values