A226376 - OEIS

A226376

Number of tilings of a 12 X n rectangle using integer-sided square tiles of area > 1.

1, 0, 1, 1, 13, 4, 98, 57, 511, 499, 3722, 3845, 24823, 31696, 164781, 243930, 1134938, 1847197, 7765162, 13890389, 53540736, 102899049, 371688482, 756873240, 2587867543, 5533483651, 18092417136, 40238855115, 126887317089, 291501063966, 892138812087

(list; graph; refs; listen; history; text; internal format)

OFFSET

0,5

LINKS

Alois P. Heinz, Table of n, a(n) for n = 0..1000

EXAMPLE

a(5) = 4:

._._._._._. ._._._._._. ._._._._._. ._._._._._.

| | | | | | | | | | | |

|___| | | |___| |___| | | |___|

| |_____| |_____| | | |_____| |_____| |

|___| | | |___| |___| | | |___|

| | | | | | | | | | | |

|___|_____| |_____|___| |___|_____| |_____|___|

| | | | | | | | | | | |

|___| | | |___| | |___| |___| |

| |_____| |_____| | |_____| | | |_____|

|___| | | |___| | |___| |___| |

| | | | | | | | | | | |

|___|_____| |_____|___| |_____|___| |___|_____|

CROSSREFS

Column k=12 of A226206.

Sequence in context: A106293 A046734 A366253 * A222165 A277125 A249267

Adjacent sequences: A226373 A226374 A226375 * A226377 A226378 A226379

KEYWORD

nonn

AUTHOR

Alois P. Heinz, Jun 05 2013

STATUS

approved