A220612 - cp's OEIS frontend

A220612 Number of ways to reciprocally link elements of an nX6 array either to themselves or to exactly two horizontal and vertical neighbors, without consecutive collinear links.

n	a(n)
1	1
2	13
3	43
4	281
5	1277
6	7041
7	34981
8	183920
9	937663
10	4861869
11	24977087
12	128971605
13	664092737
14	3424806465
15	17647051243
16	90973240309
17	468858278192
18	2416753993341
19	12456282450653
20	64204249763017
21	330924094972255
22	1705685462529549

[1, 13, 43, 281, 1277, 7041, 34981, 183920, 937663, 4861869, 24977087, 128971605, 664092737, 3424806465, 17647051243, 90973240309, 468858278192, 2416753993341, 12456282450653, 64204249763017, 330924094972255, 1705685462529549]

cp's OEIS Frontend

A220612 Number of ways to reciprocally link elements of an nX6 array either to themselves or to exactly two horizontal and vertical neighbors, without consecutive collinear links.

Table of values

List of values