A163737 Number of n X 6 binary arrays with all 1's connected, all corners 1, and no 1 having more than two 1's adjacent.

1, 6, 39, 87, 265, 1053, 5766, 30600, 146347, 654365

Offset

1,2

Links

Table of n, a(n) for n=1..10.

Example

All solutions for n=2:
...1.0.0.0.0.1...1.1.1.0.0.1...1.1.1.1.0.1...1.1.1.1.1.1...1.0.0.1.1.1
...1.1.1.1.1.1...1.0.1.1.1.1...1.0.0.1.1.1...1.0.0.0.0.1...1.1.1.1.0.1
------
...1.0.1.1.1.1
...1.1.1.0.0.1

Crossrefs

Sequence in context: A058897 A058985 A116951 * A354728 A220855 A351047

Adjacent sequences: A163734 A163735 A163736 * A163738 A163739 A163740

Keyword

nonn

Author

R. H. Hardin, Aug 03 2009

Status

approved