The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A250860 Number of (n+2)X(n+2) 0..3 arrays with nondecreasing sum of every three consecutive values in every row and column 1
 262144, 128000000, 250000000000, 1953125000000000, 5744580078125000000, 43254022503125000000000, 833747762130149888000000000, 6537811332601933992442920960000, 104624647058119410496536003666247680 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A250868 LINKS R. H. Hardin, Table of n, a(n) for n = 1..12 EXAMPLE Some solutions for n=1 ..0..2..3....2..0..3....0..2..1....0..3..0....0..0..1....2..0..2....0..1..1 ..3..3..3....0..3..2....2..2..3....3..0..2....2..3..3....2..1..2....3..2..2 ..2..1..0....3..3..1....2..2..1....1..3..1....3..3..2....2..3..2....3..0..0 CROSSREFS Sequence in context: A016785 A017490 A017622 * A016809 A018879 A016905 Adjacent sequences:  A250857 A250858 A250859 * A250861 A250862 A250863 KEYWORD nonn AUTHOR R. H. Hardin, Nov 28 2014 STATUS approved

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

Last modified February 26 16:33 EST 2020. Contains 332284 sequences. (Running on oeis4.)