A285673 - cp's OEIS frontend

A285673 Total number of nodes summed over all 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	20
2	907
3	69928
4	8190329
5	1352590668
6	299134112595
7	85301875065360
8	30466886170947633
9	13319092946564641476
10	6994728861780241970523
11	4344874074153003071077560
12	3150737511338249699332032297
13	2637670112785000275509973725820
14	2524664376417193478764383143006883

[1, 20, 907, 69928, 8190329, 1352590668, 299134112595, 85301875065360, 30466886170947633, 13319092946564641476, 6994728861780241970523, 4344874074153003071077560, 3150737511338249699332032297, 2637670112785000275509973725820, 2524664376417193478764383143006883]

cp's OEIS Frontend

Table of values

List of values