A220620 - cp's OEIS frontend

A220620 Number of ways to reciprocally link elements of an nX7 array either to themselves or to exactly one horizontal, diagonal and antidiagonal neighbor.

n	a(n)
1	21
2	4565
3	624227
4	93905509
5	13864972277
6	2054706174413
7	304265433695569
8	45062687311719797
9	6673721691080067317
10	988374130647554935157
11	146377412047334158410357
12	21678380394232186381827093

[21, 4565, 624227, 93905509, 13864972277, 2054706174413, 304265433695569, 45062687311719797, 6673721691080067317, 988374130647554935157, 146377412047334158410357, 21678380394232186381827093]

cp's OEIS Frontend

A220620 Number of ways to reciprocally link elements of an nX7 array either to themselves or to exactly one horizontal, diagonal and antidiagonal neighbor.

Table of values

List of values