A166771 Number of n X 6 1..2 arrays containing at least one of each value, and all equal values connected.

10, 132, 1618, 18584, 206392, 2247486, 24057962, 253872596, 2646985492, 27314646774, 279336752042, 2834216781868, 28557453089020, 285979131364722, 2848221941695166, 28228788045963448, 278553921030487780, 2737889369953658314, 26815069186724304206, 261785062066218670340

Offset

1,1

Links

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

Example

Some solutions for n=3
...1.1.1.1.1.2...2.2.2.2.2.1...2.2.2.2.2.2...2.2.2.2.1.1...2.2.2.2.2.2
...1.1.2.1.1.2...2.2.2.1.2.1...2.1.1.2.2.2...1.1.1.2.2.1...2.1.1.2.1.2
...2.2.2.2.2.2...2.2.2.1.1.1...1.1.1.1.1.1...1.1.1.1.1.1...2.2.1.1.1.2
------
...2.2.2.2.1.1...1.1.1.1.1.1...2.2.1.1.2.2...2.2.1.1.1.2...1.1.1.1.1.1
...2.2.2.2.1.1...1.1.1.1.1.1...2.2.2.2.2.2...2.1.1.1.1.2...1.1.1.2.2.2
...2.2.1.1.1.1...1.2.2.2.1.1...2.2.2.2.2.2...2.2.2.2.2.2...1.1.1.1.1.1

Crossrefs

Twice row 6 of A378932.

Sequence in context: A284196 A286723 A239814 * A264279 A296637 A223407

Adjacent sequences: A166768 A166769 A166770 * A166772 A166773 A166774

Keyword

nonn

Author

R. H. Hardin, Oct 21 2009

Extensions

a(7) onwards from Andrew Howroyd, Dec 12 2024

Status

approved