A333514 - cp's OEIS frontend

A333514 Number of self-avoiding closed paths on an n X 4 grid which pass through four corners ((0,0), (0,3), (n-1,3), (n-1,0)).

n	a(n)
2	1
3	3
4	11
5	49
6	229
7	1081
8	5123
9	24323
10	115567
11	549253
12	2610697
13	12409597
14	58988239
15	280398495
16	1332867179
17	6335755801
18	30116890013
19	143160058769
20	680508623307
21	3234784886251
22	15376488953815
23	73091850448509
24	347440733910081
25	1651552982759797
26	7850625988903223

[1, 3, 11, 49, 229, 1081, 5123, 24323, 115567, 549253, 2610697, 12409597, 58988239, 280398495, 1332867179, 6335755801, 30116890013, 143160058769, 680508623307, 3234784886251, 15376488953815, 73091850448509, 347440733910081, 1651552982759797, 7850625988903223]

cp's OEIS Frontend

A333514 Number of self-avoiding closed paths on an n X 4 grid which pass through four corners ((0,0), (0,3), (n-1,3), (n-1,0)).

Table of values

List of values