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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A253613 Number of (n+2)X(3+2) 0..2 arrays with every consecutive three elements in every row and diagonal having one or two distinct values, and in every column and antidiagonal having two or three distinct values, and new values 0 upwards introduced in row major order 1
 61634, 1955619, 61983527, 1985951362, 63607608304, 2039056588594, 65369339178316, 2095832672899372, 67196065694340011, 2154444488033744650, 69076069438897561178, 2214728059097013175544, 71008988237314118245588 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 3 of A253615 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 EXAMPLE Some solutions for n=1 ..0..0..0..1..1....0..0..1..0..1....0..1..1..2..1....0..1..0..1..1 ..0..2..0..0..2....2..1..2..1..1....1..2..1..1..2....1..0..0..2..2 ..2..1..2..2..0....0..0..0..0..0....2..1..2..2..0....1..0..1..1..0 CROSSREFS Sequence in context: A181261 A237013 A340438 * A257749 A340126 A112015 Adjacent sequences:  A253610 A253611 A253612 * A253614 A253615 A253616 KEYWORD nonn AUTHOR R. H. Hardin, Jan 05 2015 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 January 27 21:07 EST 2022. Contains 350643 sequences. (Running on oeis4.)