A302271 Number of 7 X n 0..1 arrays with every element equal to 0, 1, 2 or 3 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.
64, 8192, 126162, 2727755, 49315068, 982041385, 18964765818, 367139778723, 7164671008446, 139068565629649, 2707332855884141, 52711100145391758, 1025817729699289943, 19978633136068450415, 389042172263675668618
Offset: 1
Keywords
Examples
Some solutions for n=5: 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 1 1 1 0 0 1 1 0 0 0 1 1 1 0 0 1 1 0 1 0 1 0 0 1 0 1 1 0 1 0 1 0 0 1 0 1 0 0 0 1 0 1 0 1 0 0 1 0 1 0 1 1 0 0 0 1 1 0 1 1 0 0 1 1 0 1 1 0 0 0 0 1 0 1 0 1 0 0 1 0 1 0 1 1 0 1 0 1 1 1 0 1 1 0 0 1 0 0 0 1 1 0 1 1 1 0 0 1 0 0 0 0 0 1 1 1 0 0
Links
- R. H. Hardin, Table of n, a(n) for n = 1..210
Crossrefs
Cf. A302265.
Comments