A220774 Number of tilings of an 8 X n rectangle using integer-sided rectangular tiles of equal area.

1, 4, 43, 190, 2401, 15242, 169952, 1300180, 13036591, 108621208, 1032057418, 8944259474, 82759543294, 731238928631, 6675861553591, 59555740575193, 540068620936576, 4841141720468505, 43752880978895078, 393139794235777264, 3547076584685999770

Offset

0,2

Comments

a(n+1)/a(n) tends to 9.00709752194696998983966861825826335610901... - Vaclav Kotesovec, Dec 25 2012

Links

Alois P. Heinz and Vaclav Kotesovec, Table of n, a(n) for n = 0..431 (first 90 terms computed by Alois P. Heinz)

Example

a(1) = 4:
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Crossrefs

Column k=8 of A220777.

Sequence in context: A111829 A200000 A198209 * A296683 A297649 A186678

Adjacent sequences: A220771 A220772 A220773 * A220775 A220776 A220777

Keyword

nonn

Author

Alois P. Heinz, Dec 19 2012

Status

approved