A220549 - cp's OEIS frontend

A220549 Number of ways to reciprocally link elements of an nX4 array either to themselves or to exactly one horizontal, vertical or antidiagonal neighbor.

n	a(n)
1	5
2	108
3	1814
4	32173
5	565061
6	9943416
7	174911750
8	3077034244
9	54130248568
10	952245176313
11	16751640356635
12	294690365449276
13	5184113807856060
14	91197538858856819
15	1604322628219475789
16	28222813114190945744

[5, 108, 1814, 32173, 565061, 9943416, 174911750, 3077034244, 54130248568, 952245176313, 16751640356635, 294690365449276, 5184113807856060, 91197538858856819, 1604322628219475789, 28222813114190945744]

cp's OEIS Frontend

A220549 Number of ways to reciprocally link elements of an nX4 array either to themselves or to exactly one horizontal, vertical or antidiagonal neighbor.

Table of values

List of values