A302284 Number of 7 X n 0..1 arrays with every element equal to 1, 2 or 4 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.

0, 421, 3401, 3316, 14639, 69601, 384916, 1354563, 4386347, 20677591, 97720565, 380885387, 1475260386, 6221755468, 27340927933, 112702562636, 453867039251, 1891967304535, 8027410092863, 33418076358717, 137512996312519

Offset

1,2

Comments

Row 7 of A302278.

Links

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

Example

Some solutions for n=5:
  0 0 1 0 1     0 0 0 1 1     0 0 0 0 1     0 0 1 0 1
  0 0 1 1 0     0 1 0 1 0     1 1 1 1 0     0 1 1 1 0
  0 1 0 0 1     0 1 1 0 0     1 0 1 0 1     1 1 1 1 0
  0 0 1 0 1     1 0 0 1 1     0 0 0 0 1     0 0 1 0 1
  1 0 0 1 1     0 1 0 1 0     0 1 0 1 1     1 0 1 0 1
  0 1 0 0 1     1 1 0 0 0     1 0 0 0 0     1 1 1 1 0
  1 1 0 1 0     0 0 1 1 1     0 1 1 1 0     0 0 0 0 1

Crossrefs

Cf. A302278.

Sequence in context: A217587 A068701 A340157 * A353045 A302732 A251198

Adjacent sequences: A302281 A302282 A302283 * A302285 A302286 A302287

Keyword

nonn

Author

R. H. Hardin, Apr 04 2018

Status

approved