A166773 Number of n X 7 1..2 arrays containing at least one of each value, and all equal values connected.

12, 182, 3518, 67756, 1284728, 24057962, 443968782, 8093169792, 146041169658, 2612337653032, 46368803939634, 817402784921660, 14321271894199646, 249540634207399516, 4326701163983868212, 74685900757658242314, 1284014777976657543342, 21994406111684553359456

Offset: 1

Author

R. H. Hardin, Oct 21 2009

Keywords

• nonn

Examples

			Some solutions for n=3
...2.2.2.2.2.2.1...2.2.2.1.1.1.1...2.2.2.2.2.2.2...2.2.2.2.2.2.2
...2.2.2.1.1.1.1...2.2.2.1.1.1.1...2.2.2.2.1.2.2...1.1.2.2.1.2.1
...2.2.1.1.1.1.1...2.2.1.1.1.1.1...2.2.1.1.1.2.2...1.1.1.1.1.1.1
------
...2.2.2.2.2.2.2...2.2.2.2.2.2.2...2.2.2.2.2.2.2...2.2.2.2.2.1.1
...2.2.1.2.1.1.2...2.1.1.2.2.2.2...2.1.1.1.1.2.2...1.2.1.1.1.1.1
...2.1.1.1.1.1.1...1.1.1.1.1.1.2...1.1.1.1.1.1.2...1.1.1.1.1.1.1
		

Links

• Andrew Howroyd, Table of n, a(n) for n = 1..200

Crossrefs

Twice row 7 of A378932.

Extensions

a(6) onwards from Andrew Howroyd, Dec 12 2024