A271613 - cp's OEIS frontend

A271613 Number of ways to reciprocally link elements of an n X n X n triangular array with themselves or a neighbor, with no more than 4 elements linked to themselves.

n	a(n)
1	1
2	4
3	26
4	307
5	2571
6	42702
7	3243689
8	132728354
9	1491326272
10	101843558868
11	74672717363118
12	12952235029243936
13	334070494079203752
14	109915013016304822208
15	695394278635888843298780
16	579704015638436450676621584
17	44655320458467210977882177104
18	75051772861714827753881814035744

[1, 4, 26, 307, 2571, 42702, 3243689, 132728354, 1491326272, 101843558868, 74672717363118, 12952235029243936, 334070494079203752, 109915013016304822208, 695394278635888843298780, 579704015638436450676621584, 44655320458467210977882177104, 75051772861714827753881814035744]

cp's OEIS Frontend

A271613 Number of ways to reciprocally link elements of an n X n X n triangular array with themselves or a neighbor, with no more than 4 elements linked to themselves.

Table of values

List of values