A320512 - cp's OEIS frontend

A320512 Total number of nodes summed over all 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	5
2	31
3	258
4	2702
5	33821
6	492978
7	8198218
8	153136209
9	3173544162
10	72241986729
11	1791612993205
12	48074653669593
13	1387590910289915
14	42863756641047136
15	1410904918289665343
16	49296029555617568097
17	1822020250023113834772
18	71023629427964322798782

[1, 5, 31, 258, 2702, 33821, 492978, 8198218, 153136209, 3173544162, 72241986729, 1791612993205, 48074653669593, 1387590910289915, 42863756641047136, 1410904918289665343, 49296029555617568097, 1822020250023113834772, 71023629427964322798782]

cp's OEIS Frontend

A320512 Total number of nodes summed over all 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