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

1,1

Comments

Row 7 of A302265.

Links

R. H. Hardin, Table of n, a(n) for n = 1..210

Example

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

Crossrefs

Cf. A302265.

Sequence in context: A084004 A264016 A160448 * A301847 A302970 A291832

Adjacent sequences: A302268 A302269 A302270 * A302272 A302273 A302274

Keyword

nonn

Author

R. H. Hardin, Apr 04 2018

Status

approved