A317985 - cp's OEIS frontend

A317985 Number of self-avoiding planar walks starting at (0,0), ending at (n,0), remaining in the first quadrant and using steps (0,1), (1,0), (1,1), (-1,1), and (1,-1) such that (0,1) is never used directly before or after (1,0) or (1,1).

n	a(n)
0	1
1	2
2	7
3	38
4	284
5	2691
6	30890
7	416449
8	6448243
9	112751661
10	2197200541
11	47214026822
12	1109022356759
13	28269085769331
14	777140210643254
15	22918982645377342
16	721764216387297451
17	24173661551378798838
18	857993099925433301350
19	32168967331652245055171

[1, 2, 7, 38, 284, 2691, 30890, 416449, 6448243, 112751661, 2197200541, 47214026822, 1109022356759, 28269085769331, 777140210643254, 22918982645377342, 721764216387297451, 24173661551378798838, 857993099925433301350, 32168967331652245055171]

cp's OEIS Frontend

A317985 Number of self-avoiding planar walks starting at (0,0), ending at (n,0), remaining in the first quadrant and using steps (0,1), (1,0), (1,1), (-1,1), and (1,-1) such that (0,1) is never used directly before or after (1,0) or (1,1).

Table of values

List of values