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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A251651 Number of (n+2)X(7+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 0 2 4 5 7 or 9 1
 6978, 49956, 163318, 610082, 5248890, 17185778, 63447690, 562400186, 1826236602, 6707952986, 60713749434, 196015117610, 717238558554, 6591100286714, 21191371865802, 77327675043578, 718376458646010, 2302904073545738 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 7 of A251652 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = 4*a(n-1) +3*a(n-2) +101*a(n-3) -438*a(n-4) -329*a(n-5) +990*a(n-6) -220*a(n-7) -110*a(n-8) for n>13 EXAMPLE Some solutions for n=3 ..1..0..2..1..0..2..1..3..2....3..2..1..0..2..1..0..2..1 ..1..3..2..1..3..2..1..0..2....0..2..1..0..2..1..3..2..1 ..1..3..2..1..3..2..1..3..2....0..2..1..3..2..1..0..2..1 ..1..0..2..1..0..2..1..3..2....3..2..1..0..2..1..0..2..1 ..1..0..2..1..3..2..1..0..2....3..2..1..3..2..1..3..2..1 CROSSREFS Sequence in context: A050225 A305718 A237237 * A050673 A050663 A114615 Adjacent sequences: A251648 A251649 A251650 * A251652 A251653 A251654 KEYWORD nonn AUTHOR R. H. Hardin, Dec 06 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified February 6 23:12 EST 2023. Contains 360111 sequences. (Running on oeis4.)