A277359 - cp's OEIS frontend

A277359 Number of self-avoiding planar walks starting at (0,0), ending at (n,n), remaining in the first quadrant and using steps (0,1) and (1,0) on or below the diagonal and using steps (1,1), (-1,1), and (1,-1) on or above the diagonal.

n	a(n)
0	1
1	2
2	7
3	32
4	176
5	1126
6	8227
7	67768
8	622706
9	6323932
10	70400734
11	852952952
12	11176241098
13	157506733030
14	2375966883371
15	38200984291800
16	652179787654530
17	11783182484950980
18	224623760504277810
19	4505795627243046240
20	94873821120923655336
21	2092249161797280567516

[1, 2, 7, 32, 176, 1126, 8227, 67768, 622706, 6323932, 70400734, 852952952, 11176241098, 157506733030, 2375966883371, 38200984291800, 652179787654530, 11783182484950980, 224623760504277810, 4505795627243046240, 94873821120923655336, 2092249161797280567516]

cp's OEIS Frontend

A277359 Number of self-avoiding planar walks starting at (0,0), ending at (n,n), remaining in the first quadrant and using steps (0,1) and (1,0) on or below the diagonal and using steps (1,1), (-1,1), and (1,-1) on or above the diagonal.

Table of values

List of values