The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A233429 Number of tilings of a 4 X 5n rectangle with 4n pentominoes of any shape. 2
 1, 501, 890989, 1666772813, 3125064284901, 5859766228545967, 10987595369808657169, 20602741350971679371521, 38632014757792375332001835, 72438542874037975287077565935, 135828859204452470219311220073385, 254691470323770059993623356733063003 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Alois P. Heinz, Table of n, a(n) for n = 0..100 Wikipedia, Pentomino FORMULA a(n) ~ c * d^n, where d = 1875.09099182186211660253860201132854810972459605757360689785461004..., c = 0.25279505771792803447854701369537504374767224177480509542292622525... . - Vaclav Kotesovec, Mar 05 2016 CROSSREFS Quintisection of column k=4 of A233427. Sequence in context: A097425 A320206 A320215 * A121577 A250609 A251266 Adjacent sequences:  A233426 A233427 A233428 * A233430 A233431 A233432 KEYWORD nonn AUTHOR Alois P. Heinz, Dec 09 2013 STATUS approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified August 10 13:12 EDT 2022. Contains 356039 sequences. (Running on oeis4.)