A220622 - cp's OEIS frontend

A220622 Number of ways to reciprocally link elements of an 3 X n array either to themselves or to exactly one horizontal, diagonal and antidiagonal neighbor.

n	a(n)
1	1
2	22
3	125
4	1189
5	9176
6	76955
7	624227
8	5131406
9	41957895
10	343809419
11	2814822600
12	23053276257
13	188779537161
14	1545969533334
15	12660108907789
16	103675885828389
17	849017313171328
18	6952739324271787
19	56937068599653211
20	466266655043137726

[1, 22, 125, 1189, 9176, 76955, 624227, 5131406, 41957895, 343809419, 2814822600, 23053276257, 188779537161, 1545969533334, 12660108907789, 103675885828389, 849017313171328, 6952739324271787, 56937068599653211, 466266655043137726]

cp's OEIS Frontend

A220622 Number of ways to reciprocally link elements of an 3 X n array either to themselves or to exactly one horizontal, diagonal and antidiagonal neighbor.

Table of values

List of values